I recently purchased a couple of Zemismart Buttons for use as toggle switches. When I add them to Zigbee2MQTT, they show up as unsupported (as TS0215A). However, I do see that the configuration does at least exist with Zigbee2MQTT (MultIR MIR-SO100 control via MQTT | Zigbee2MQTT). I’ve tried deleting and repairing without success. Is there a way to change the detected device (or easily fix the issue)?
Sounds like you bought some that look the same but are different. Different vendor or mfgr or something, or they changed it. Happens all the time.
You probably need a quirk. You cannot reasonably change what the firmware reports as without flashing it, so you just tell Z2M what to do with it.
There are links in here to figure it out: The Home Assistant Cookbook - Index