What?
This is a copy of the old official Tuya integration from Home Assistant 2021.9.7, copied from the repo.
It uses the old Tuya API, which they deprecated and is on its way to being disabled (presumably in December 2021).
Why?
In Home Assistant 2021.10.0 the Tuya integration was replaced with Tuya v2, and, unfortunately, some of the devices are not supported there.
How?
Add this repo to HACS and install Tuya (old) integration.