[1] Steadman was educated at Great Gidding Primary School, then privately at the independent Mount Kelly school in Tavistock, Devon,[4] and completed a BSc (Hons) Psychology degree, followed by a master's degree in Business and Management at the University of Portsmouth.

On 20 August 2018 it was announced that Steadman would be a contestant on series 16 of Strictly Come Dancing, partnered with AJ Pritchard.

[1] Competing in the Women's PTS5 classification at the 2020 Summer Paralympics in Tokyo, Steadman overtook Grace Norman early in the cycling leg and maintained her lead through the run to take the gold medal by 41 seconds.

[11][12] Steadman was appointed Member of the Order of the British Empire (MBE) in the 2022 New Year Honours for services to triathlon.

[13][14] She competed at the 2024 Summer Paralympics, winning the bronze medal in the Women's PTS5 triathlon behind Grace Norman and compatriot Claire Cashmore.