How can we test an update from a specific pre-transfer app version to the first post-transfer release?

We recently completed an app transfer between two Apple Developer Program teams.

Before releasing the first post-transfer version, we need to verify the update behavior from several specific historical versions signed by the previous team. Our main question is not limited to TestFlight: we would like to know Apple's recommended and supported method for reproducing this update path.

Could you clarify the following?

1. What is Apple's recommended and supported method for testing an update from a specific pre-transfer version to the first post-transfer release?
2. Can an archived Ad Hoc IPA signed by the previous team be used as the starting version for this test?
3. Can that IPA be updated by a post-transfer TestFlight, Development, or Ad Hoc build signed by the recipient team?
4. Which of these methods most accurately reproduces an App Store update after an app transfer?
5. For a manual Development or Ad Hoc update, is the previous-application-identifiers entitlement required?
6. If it is required, how should the recipient team request a provisioning profile that authorizes this entitlement?

Thank you.