@pixelfed first time trying Pixelfed! got TestFlight on iPhone 12 Mini iOS 16.4.1(a). couple issues:
- choose a server screen a little too long for 12 Mini.
- trying to sign up for an account on pixelfed.org hung on Please Wait screen and never finished.

I signed up on web at pixelfed.social and then could log in to app. All good from there.