If your setup allows random udp ports from home assistant out to your network it works fine. Mines running in a kurbenetes cluster.

I used a configmap that mounts the code to patch the integration so it doesn’t get overwritten. I haven’t had time to troubleshoot more though I don’t see why the patch would stop text to speak from working on the esphome devices. The code changed significantly and uses raw audio files now and the only thing I am changing is making the ports not random, but a range instead. The M5 stack firmware appears to be up-to-date too.

Issue on GitHub with all of this is here