@jorgeluis I got a Heltec LoRa V3 board, which is widely supported by projects AFAIK. Other than that it would depend on the specific software stack you want to use.

#Meshcore:
https://github.com/ripplebiz/MeshCore/tree/main?tab=readme-ov-file#-hardware-compatibility
(Super simple to get started. Tries to solve flaws from #meshtastic.)

#Reticulum:
https://reticulum.network/hardware.html
(Super versatile and what I suspect to be the best tech stack. But rather complex and steep learning curve.)

In the end there should be an overlap of the most common devices.