[1] In October 2018, he debuted on the ISU Junior Grand Prix (JGP) circuit, finishing 18th in Ljubljana, Slovenia.

In late August, Appleby won bronze in Courchevel, France, at the second event of the 2021–22 ISU Junior Grand Prix season.

Appleby made his senior ISU Grand Prix debut at the 2022 MK John Wilson Trophy, where he placed last overall.

The week after, he competed at the Golden Spin of Zagreb, where he placed 6th and achieved the technical minimums to be eligible for the 2024 World Figure Skating Championships.

[5] Weeks later, he competed at the 2024 World Championships, placing thirty-eighth in the short program and failing to advance to the free skate.