Have you tried pinging a known external IP (e.g. 8.8.8.8) to see if it’s visible from the LAN devices? It could be something as simple as DNS not being setup correctly. Also, have you verified that the LAN devices are being assigned an address?

I like using vagrant and/or docker to provision the environments, when possible.

I’m thinking Elon doing this crazy rename is a throwback

https://en.m.wikipedia.org/wiki/X.com