My M5Stack Atom Echo is completely setup but fails to respond to my requests. It does work in the sense that it executes the command. And it gives the status responding too but nothing can be heared…
Voice assistant on my phone does work. It gives a reply and says it aloud.
Is this your only esphome voice device? Do the others show this error?
Do you have esphome device configurator installed? If so you can watch live log from device as you make command.
If not look at settings >> voice assistants >> [three vertical dots] next to your assistant >> debug
You can see last command and any issue that may have occurred. This may help you.