Recently, Apple announced that it will require apps providing account creation functionality to also provide a way to delete account.
Corresponding updates to App Store Review Guidelines 5.1.1 now be enforced starting January 31, 2022.
The updates to App Store Review Guideline 5.1.1 last June provided users with greater control over their personal data, stating that all apps that allow for account creation must also allow users to initiate deletion of their account from within the app. This requirement applies to all app submissions starting January 31, 2022. We encourage you to review any laws that may require you to maintain certain types of data, and to make sure your app clearly explains what data your app collects, how it collects that data, all uses of that data, your data retention/deletion policies, and more as described in the guideline. Examples of this type of data include electronic health records, and sales and warranty records. Please also confirm that the app privacy information on your product page is accurate.Apple Developer
App Store: App Store Review Guidelines
Apple Developer: Account deletion within apps required starting January 31
Developer:Be ready to implement required features.
QA engineer:Be prepared to test account deletion flows.
PM/DM:Start work on account deletion functionality, if not implemented yet.