Currently, "Require re-register MFA" can only be set https://docs.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-userdevicesettings#manage-user-authentication-options, or via Pow...
Come on Microsoft, you want to get rid of basic auth, so the way with MSOnline is not an option anymore. Get a Graph API going for this.
We want to be able to do this with PowerShell, GUI isn't an option.