Previously, Mitchell left Arsenal in 2022 and went on to play for Swansea City, Haringey, and Aylesbury.
It's possible that Mitchell will work with the under-21 team this season, as several goalkeeper prospects are looking to go on loan for the new season.
Despite being 22 years old, Mitchell still qualifies for the under-21 team this season.
However, Arsenal has not yet made any official announcement regarding Mitchell's return to the team.