It’s not immediately deployable. Especially since you need internet to get the app, and what authoritarian regimes do first is cut the internet.

A bitchat over meshtastic firmware was release a couple of days ago, that could extend the range significantly. Still not perfect.

I find it works great across rooms or within a building. It works good underground like in subways. And the most obvious use case is classrooms/movies/auditoriums in general.