Oh, come on.

You can still DIY shit like Meshtastic

... where it’s not possible to communicate with someone digitally...

I'd be thrilled to go back to that, if what we're getting now instead is the only other option. But, I grew up in the before-times, so I'm not so put off by the idea.

You cannot ban cryptography, so the messenger is not the problem. You can control computing hardware tho...

Check out Briar and Meshtastic

better idea: communicate irl. and also we need proper end-to-end encrypted chats that exchange public keys from device to device directly (NFC or QR code) (which requires physical meeting).

You could always get really into steganography

I hope you live in DC. Or Florida.