Oh. Well, check the Hall of Fame anyway. (When you beat Geeta, the game saves your team, for the "Hall of Fame", which appears in EVERY main-series game.)
okay... I just found out there is none in SV... (wow... They got RID OF IT!!!) But there is a different way to check... Look for the Champion Ribbon, if any of your Pokemon have it, they were on the team that originally beat Geeta.
Ik my sword hall of fame team. I keep changing it by rebattling Leon, it's fun to demolish him. Zacian, cinderace, Eternatus, Silvally(from rebattling), I think a ditto maybe, and the last one I completely forgot lol