I’m wondering since they mention “it’s not a Linux distro” if they will expand these tools to other kernels like RedoxOS ?

If you’re interested in Meshtastic, take a look at Reticulum : https://reticulum.network/

In my opinion, those warnings are not used to help users but to shame developpers for not trully sandboxing and verifying their apps. Developpers know that having this warning will decrease the number of users downloading it. The goal in the long run is to improve app sandboxing and security.