RFE: Admin settings to choose 2FA system

In an organisational deployment 2FA may be mandatory, and almost certainly the organisation will have a preferred (required!) 2FA solution. At that point it doesn't make sense to let the user have the choice of 2FA systems and the user settings section should have only the backup code.

So feature would be an admin section for the 2FA, where the admin chooses the 2FA solution, with some warnings as relevant to check that users have phone numbers, or whatever the dependency is, configured in the user's account.

Ideally the user account admin side will be extended to allow admins to add the related information on user creation.

No files, tests, or entry points are named. Start by locating the existing administrator settings, user settings, user-creation flow, and 2FA provider selection, then establish how provider-specific prerequisites are represented. Done means an administrator can select the required 2FA solution, users see only the applicable backup option, and relevant account information can be supplied during user creation.