Apple can use their accounts for Apple sign in.

If you didn’t rely exclusively on Apple for app identity, you would want to provide an account of your issuance so you can see what the testers hit. Not giving them and count you miss getting feedback. (imo)

As you states, you can’t issue an AppleID to testers, they must do that themselves.

Apple can use their accounts for Apple sign in.

If you didn’t rely exclusively on Apple for app identity, you would want to provide an account of your issuance so you can see what the testers hit. Not giving them an account makes you miss getting feedback. (imo)

As you stated, you can’t issue an AppleID to testers, they must do that themselves.

Apple can use their accounts for Apple sign in. You would want to provide an account of your issuance so you can see what the testers hit. Nit giving them and count you miss getting feedback. (imo)

Apple can use their accounts for Apple sign in.

If you didn’t rely exclusively on Apple for app identity, you would want to provide an account of your issuance so you can see what the testers hit. Not giving them and count you miss getting feedback. (imo)

As you states, you can’t issue an AppleID to testers, they must do that themselves.