Sandbox Apple ID Accounts
I wanted to ask this in the Lobby but couldn’t figure out how lol. I have a few questions regarding sandbox Apple ID accounts used and created for Developers. I have always been under the impression that sandbox accounts are test/dummy accounts strictly used for testing in-app purchases, subscription renewal issues, and sometimes used with Apple Pay. To be eligible for use as a sandbox account, the Apple ID must not have already made previous purchases on the iTS.
With that being said, is it possible for a personal Apple ID account to be considered a sandbox Apple ID? If so, what circumstances would allow this to be the case? If using TestFlight for any beta testing of apps, when enrolling with TestFlight, does this somehow trigger a personal Apple ID account to have the option in Settings > App Store to view the sandbox account settings?
iPad Pro, iPadOS 16