It seems very unlikely the US would take the approach of shutting down the internet to prevent communication. All the internet infrastructure is hardwired for US surveillance data collection, so it's already a perfect honeypot. Why shutdown your honey pot?

More likely to be useful in the US is communication that is actually private, secure, and not centralized, but the underlying communication channel if unlikely to be relevant. Signal for example would almost certainly have thier IP blocked in the area, or their servers taken down because their completely centralized and therefore easy to block. Realistically something that can leverage an adversarial network to implement mesh communication that can be obfuscated (so it's not easily detected and blocked) is more useful in the US.

Do you think the govt will not force Google to revoke developer certs once developer verification is in place to prevent sideloading or not order Google/Apple to forcibly uninstall them ?

These are great tools in American toolkit if it wants to do a regime change in other countries. Their effectiveness within America are questionable.

The military can very easily find and eliminate repeaters very quickly and almost certainly would.

Meshtastic is both extremely range limited and trivial to DDOS. It's a fun toy protocol but it's not resistant to nation state disruption at all.

I looked a bit into meshtastic and was told that if a node was physically compromised then messages could be intercepted. That cant be right, right?

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