Problems with country/region and family share

Bought a Mac in the U.S., couldn't complete the Apple Care+ setup, left my family share group, changed country/region to the U.S., and the problem was solved.

Have not tried going back to my family share group but I am almost sure I might not be able to get back in because of my region. Any suggestions? In Family Share, we have a subscription that includes all the Apple services. It'd be nice to get back to it but the main priority is preserving the Apple Care+ coverage.

Thank you 🫡