Starlink Direct-to-Cell fills that use case better than Starlink Mini. It works with existing cell phones. Unlike the iPhone's built in satellite feature, it doesn't require pointing your phone at the satellite, and it supports WhatsApp, Google Maps, and several other apps in addition to RCS and SMS.
Probably not. If it is certified for emergency purposes, it would have say so because that would expand the market quite a lot e.g. military operation, emergency services.
iPhone's satellite connection isn't certified for anything either. It's a best-effort backup. This would be no different.
(All Apple has is the license for the radio bands they use to communicate with the satellites.)
that reminds me of IT Crowd, reporting a fire via email