Espoir: 2016–17

In March 2016 Achampong competed at the British Team Championships where she placed eleventh in the all-around but recorded the third highest balance beam score and helped her team finish fifth.^[2]

In April 2017 she competed at the English Championships where she only competed on uneven bars, balance beam, and floor exercise and recorded the second highest scores on uneven bars and balance beam.^[3] In December she competed at the British Espoir Championships where she placed first in the all-around, on balance beam, and on floor exercise, and placed second on uneven bars.^[4]

Junior: 2018

In February Achampong competed at the English Championships where she placed second behind Amelie Morgan.^[5] The following month she competed at the British Championships where she placed third in the all-around behind Morgan and Annie Young. During event finals she placed third on uneven bars and floor exercise and sixth on balance beam.^[6]

In April Achampong competed at the 2018 City of Jesolo Trophy where she placed fifteenth in the all-around and helped Great Britain finish fourth in the team competition.^[7] In July she competed at a friendly competition in Pieve di Soligo where she placed eleventh in the all-around but helped Great Britain win the bronze in the team competition.^[8]

In August Achampong represented Great Britain at the European Championships alongside Morgan, Young, Halle Hilton, and Phoebe Jakubczyk. Together they won the bronze medal in the team competition behind Italy and Russia. Individually Achampong finished tenth in the all-around.^[9] Achampong ended the season at the Top Gym Tournament where she won gold on balance beam and placed fourth in the all-around and on floor exercise.^[10]

Junior: 2019

In February Achampong competed as a guest at the Welsh Championships where she placed first in the all-around and recorded the highest score on each apparatus.^[11] In March she competed at the English Championships where she placed first in the all-around ahead of Halle Hilton and Jennifer Gadirova.^[12] Later that month she competed at the British Championships where she placed first in the all-around and also won gold on uneven bars and balance beam and placed fourth on vault.^[13]

In July Achampong competed at the Sainté Gym Cup where she helped Great Britain win team gold and individually she placed first in the all-around.^[14] Later that month she competed at the European Youth Summer Olympic Festival alongside Hilton and Young. Together they won bronze in the team competition behind Russia and Romania. Individually Achampong won silver in the all-around behind reigning junior world champion Viktoria Listunova of Russia. During event finals she won gold on balance beam ahead of Silviana Sfiringu of Romania.^[15]

2020

In 2020 Achampong became a senior. She made her senior debut at the Melbourne World Cup where she qualified to the balance beam and floor exercise finals. During event finals she won silver on balance beam behind Urara Ashikawa of Japan and placed fourth on floor exercise behind American Jade Carey and Italians Vanessa Ferrari and Lara Mori.^[16] She later competed at the Baku World Cup; during qualifications she once again qualified to the balance beam and floor exercise event finals.^[17] However event finals were canceled due to the COVID-19 pandemic in Azerbaijan.^[18]

In June Achampong announced that she had verbally committed to the University of California, Berkeley to compete for their gymnastics program.^[19]

2021

In April Achampong was named as an alternate for the European Championships.^[20] In May, Achampong competed at the Varna World Challenge Cup, where she qualified to the uneven bars, balance beam and floor exercise finals. During event finals, she placed third on balance beam behind Anastasiia Bachynska of Ukraine and Marine Boyer of France.

In November Achampong competed at the British Championships and won gold in the all-around, silver on uneven bars, and on balance beam, and bronze on floor exercise.

2022

Achampong competed at the English and British Championships where she finished fourth and second in the all-around. In June she was selected to represent England at the 2022 Commonwealth Games alongside Georgia-Mae Fenton, Claudia Fragapane, Alice Kinsella, and Kelly Simm.^[21] The group went on to win gold in the team competition while Achampong also took silver in the individual all-around.^[22][23]

Achampong was also selected to compete at the European Championships alongside Kinsella, Fenton, and Aylesbury teammates Jennifer and Jessica Gadirova.^[24] In August Achampong competed at the European Championships. She contributed scores on vault, uneven bars, and balance beam towards Great Britain's second-place finish.^[25] During event finals Achampong won silver on balance beam behind Emma Malewski of Germany.

In September Achampong was named to the team to compete at the 2022 World Championships, once again alongside the Gadirova twins, Kinsella, and Fenton.^[26] She finished fifteenth in qualifications but did not advance to the all-around due to teammates Gadirova and Kinsella placing higher. During the team final Achampong competed on vault and balance beam, helping Great Britain win the silver medal and achieve their highest placement at a World Championships.^[27]

2023

At the English Championships Achampong placed first in the all-around, on uneven bars, and on floor exercise as well as placing second on balance beam.^[28] She then went on to compete the Welsh Championships, where she placed second on balance beam and in the all-around and placed third on uneven bars and floor exercise.^[29] At British Championships she placed second all-around and first on balance beam.^[30] Achampong was named to the team to compete at the upcoming European Championships alongside Becky Downie, Georgia-Mae Fenton, Jessica Gadirova, and Alice Kinsella.^[31] At the European Championships Achampong helped Great Britain win their first team gold medal. Additionally she qualified to the balance beam final.^[32]

In September Achampong was selected to represent Great Britain at the 2023 World Championships alongside Gadirova, Kinsella, Fenton, and Ruby Evans.^[33] While there she helped the team qualify in second to the team final. Individually Achampong qualified to the all-around final. During the team final Achampong contributed scores on vault and balance beam towards Great Britain's sixth place finish.^[34] During the all-around final she finished thirteenth.^[35]

In November Achampong signed her National Letter of Intent with the California Golden Bears.^[36]

2024

Achampong began the year competing at the Cairo World Cup. She finished third on the uneven bars and fourth on balance beam.^[37] At the English Championships, she placed first all-around and on the balance beam, as well as second on the uneven bars and floor exercise.^[38] At the British Championships she placed first all-around, on the uneven bars, the balance beam, and the floor exercise.^[39] Achampong was initally named the team to compete at the European Championships; however she withdrew as a precautionary measure.^[40][41] It was later revealed that Achampong had torn her ACL while performing an uneven bars dismount at a controlled competition.^[42]