If you want to prevent users from exporting Saved Passwords in Microsoft Edge, check this Group Policy Editor method and Registry hack.

Microsoft is phasing out the password management feature in its Authenticator app, urging users to back up their saved passwords immediately. This functionality will be transferred to the Edge ...

And starting Aug. 1, you'll no longer be able to use saved passwords. If you still want to use passwords instead of passkeys, you can store them in Microsoft Edge.