However, for iOS and iPadOS, the answer is “Sort of”.
As taken from https://support.apple.com/en-gb/guide/deployment/dep4d9e9cd2...:
> If a user is signed in with a personal Apple Account and Managed Apple Account, Sign in with Apple automatically uses the Managed Apple Account for managed apps and the personal Apple Account for unmanaged apps.
However, for iOS and iPadOS, the answer is “Sort of”.
As taken from https://support.apple.com/en-gb/guide/deployment/dep4d9e9cd2...:
> If a user is signed in with a personal Apple Account and Managed Apple Account, Sign in with Apple automatically uses the Managed Apple Account for managed apps and the personal Apple Account for unmanaged apps.