[3] As a junior gymnast, Leydin represented Australia at the 2011 Commonwealth Youth Olympics.
[3] The following year, Leydin suffered a foot injury which affected her ability to perform leading up to the 2014 national championships.
[3] In 2015, Leydin finished third in the all-around at nationals and was part of Australia's gymnastics team for the 2015 World Championships in Glasgow, Scotland.
[3][5] Her final year competing in Australian nationals was 2016 when she placed seventh in the all-around event.
Leydin was out for the majority of the season due to injury, but was well enough to compete at three meets and the NCAA gymnastics Regionals held in Lincoln, Nebraska.