I’m late to this thread, but I noticed that @kbx81, who is one of the maintainers(?) of ESPHome has a PCB he’s developed as an IR Blaster. I’ve been meaning to circle back to this and check it out, but stumbled on this thread and thought I would share.
I am away from my lab and HA at present. Give me few weeks, once I am back I will check my configuration and post here. Meanwhile can you check and post the Tuya firmware version that’s running on this?