I have a similar issue. I've been part of the development team for a while, and have used the auto provisioning for that team to build mac and ios apps. Just today something changed and now I can't see the team in xcode - however, when I check AppStoreConnect then I can see that I'm still part of the team. Other team members have confirmed that I'm still listed in the team, and my devices are still listed, so everything should be working fine. Seems like it's just something weird happening with xcode provisioning profiles.