I’ve built but not been able to test (as my board got damaged by children) a usermod to bring up the ES7210 Mic on I2c and stream to I2S. I am a new user here so cannot upload yet so I have created all the details and file over on github. It would be fantastic if someone could test while I await a new board, which should be with me in a week or two. https://github.com/phill104/ES7210-I2S-Mic-Usermod-for-WLED
A hint: Not a job for custom usermod. Instead create a new audio source class (within existing Audioreactive usermod) and submit PR upstream.
Thanks. I wanted to make sure this worked. If it does then I would be happy to go that route. I am very new to WLED and only 2 days into looking at the project.