iPhone mirroring automatic authentication issue in EU Region

I live in the EU where iPhone Mirroring is not supported yet.

I traveled abroad for a few weeks and got access to iPhone Mirroring and tried it out and set it to automatically authenticate. As a result, Require a password after screen saver begins or displays is turned off option is grayed out and cannot be changed because of this setting in the iPhone Mirroring app and I no longer have access to the iPhone Mirroring app due to regional restrictions to disable the automatic authentication.

What can I do?

[Re-Titled by Moderator]