Yes, theater/church camp. A user on Reddit claims that Josh got caught giving head to a guy there, lol :
„Basically he’s had a list of lovers including both girls and guys. Hes been caught hooking up with guys during his theater/church camp and when his parents found out he convinced them that the guys he were with pressured him and he made his parents believe that he wasn’t bi. He hooked up with close guy friends who are family friends and then made his family resent the guys. After hooking up with guys he’d frequently call them the f slur afterwards.“ Source:
https://www.reddit.com/r/Deuxmoi/comments/kufoly/any_tea_on_olivia_rodrigo_and_joshua_bassett/
Take it with a grain of salt but that user did make the effort to return and claim victory after Josh‘s coming out. And he was very correct when he claimed that Josh has been having lots of mental health issues with anxiety and depression (even before the Olivia Rodrigo drama).