Yes. I’ve only tested it manually scanning to save battery life though.

There is also a FOSS app called Airguard on F-Droid that I found works well.

This would be very useful for offline installation.

Exactly this. I use Signal for people close to me and SMS or Email for those who don’t use signal, who I don’t have coversations with often anyways. Dispite it’s many, many flaws, I will use SMS before I use a Meta messenger.