In 2015, Neita finished fourth in the 100 metres final at the European Junior Championships, in 11.69 seconds. In 2016, she finished second with 11.24 seconds in the 100 metres at the British Championships, earning Olympic selection. A week later at the 2016 European Championships, she won a silver medal in the 4 x 100 metres relay. On 22 July 2016, Neita and her teammates Asha Philip, Desiree Henry and Dina Asher-Smith broke the British record in the 4 x 100 metres, with 41.81 seconds. At the 2016 Rio Olympics, Neita was eliminated in the heats of the 100 metres in 11.41, narrowly failing to qualify for the semi-finals. In the sprint relay, she won a bronze medal along with teammates Asha Philip, Desiree Henry and Dina Asher-Smith, improving the British record they had set a month earlier with 41.77 seconds. On winning Neita said "I am speechless. I am so proud of our team. We absolutely smashed it." On 17 June 2017, Neita improved her 100 metres personal best to 11.20 secs at the England U23 Championships, before going on to finish second at the British Championships on 1 July, running 11.25, earning World Championship selection. A week later at the Anniversary Games in London, she further improved her 100 metres best with 11.14, to move to seventh on the UK all-time list. At the 2017 World Championships in London, she ran 11.15 in her 100 metres heat to qualify for the semi-finals, where she was eliminated running 11.16. She went on to win a silver medal in the sprint relay, along with her 2016 Olympic teammates Philip, Henry and Asher-Smith. In June 2018, Neita ran 11.19 secs to finish second at the British Championships, earning selection for the European Championships in Berlin. At the Championships she qualified for the semi finials but missed out on the final after finishing 4th in a time of 11.27. In September 2019, Neita finished in 1st place in the 100m, representing Europe in The Match, a two-day team competition against the USA in Minsk, Belarus. At the 2019 World Championships in Doha, she improved her 100 metres best to 11.12 secs to reach the semi-finals, where she ran 11.18. She went on to win a silver medal in the 4 × 100m relay.
