For a small home improvement project, I got this dev board (based on ESP32-C3-12f), with multiple power supply options.
First thing, I tried flashing it with ESPhome. However, no suck luck. I was so puzzled that I started suspecting the board itself.
To test the board, I flashed it with Tasmota32 (it has C3-specific build). It worked! So, I went on to fiddle with the board. One funny aspect - the relay contact isn’t connected to ESP32 at all! To make the relay work, you have to short some GPIO contact to it.
Anyway, while fiddling with Tasmota I realized it supports Matter. Tried adding it to Google Home - got “Uncertified Device”. Tried HA (had to install matter-docker) - and it worked! I’m very pleased with myself 
I realize I could’ve just used MQTT, but setting up my first Matter device is so much cooler
