When will the Account Deletion Feature started to be reviewed ?

Understood that the account deletion requirement will be enforced on 30 June, 2022.

Here are some questions:

1. Will this checking be applied to new submission only or all existing apps without this function will be removed from the App Store, even if no updates are submitted?

2. When will this requirement be included in the review? If I submit an application to the App Store NOW, before June 30, will it be checked on this requirement? I want to test if my develop is sufficient already for this requirement.