Because you mention Tuya Zigbee in particular, it’s best to ask your question directly in the right topic → [APP][Pro] Tuya Zigbee App
And because you are a member of the community for some time now, you certainly know that the development of a community app depends only on the community developer and not on Athom.
There has never been a guarantee that new devices will be added to an app or that the app will be developed further in general. Of course it would be better if there were a guarantee, but unfortunately this is not the case.
So I guess the Tuya Zigbe App from Johan will never be supported by Athom. Athom is developing the Tuya Cloud App on behalf of Tuya and they will certainly not develop an additional Tuya Zigbee App.
This is exactly what Athom does. Athom/Tuya connects in a simple way the devices of the Tuya cloud world with Homey. It’s the same like all the other cloud systems work.
With (Tuya) Zigbee devices, you need to pay attention to certain things so that Zigbee works stably.
Btw, I don’t use a single Tuya device for good reasons… 
