> mSzyfr was touted by the government as "the first secure instant messenger fully under Polish jurisdiction."

So only "under Polish jurisdiction". There ia no guaranty that it is developed in Poland.

> It does, however, rely on multi-factor authentication (MFA) provided by US megacorps. Microsoft is the recommended option, but users can also opt for Google or FreeOTP.

So Polish.

I think Signal should stop doing their new feature announcements in the form of chat messages.

This weakens their claim "we don't contact users", because it makes it look like they do.

Dedicated UI, like bottom sheets, snackbars, etc., doesn't have this problem.

‘Secure’