I was writing that app together with the author, the communication is using ESPnow at the moment, albeit Tactility is running on devices with LoRa so it isn't that difficult to extend for LoRa.

Also contributor to Tactility, there's a pull request for a LoRa chat app with (I believe) Meshtastic support. https://github.com/ByteWelder/Tactility/issues/342

Very good. I guess will give a new look over there soon to try out the novelties.