LoRA networks as a general technology are only as private as they are designed to be. I have the option of both Meshtastic and Meshcore in my city, and as far as I'm aware, they both use E2EE.

Nodes and relays don't store data for any period longer than it takes to relay a message, and even if they did, it would be encrypted. On top of that, they're separate from other WAN/radio networks operated by capital interests, so they're resistant (not impervious) to the influence of money and government.

As a solution for activism, I think they are a great choice, but they are limited by the fact that you need a device compatible with LoRA and the particular network standard you're using, as would everyone else.