From what I’ve seen, read, and experienced, Tuya hopes (or hoped) you would buy Tuya only stuff. They do (or did) not aim at compatibility (at all).
Of course their own zigbee hub + Tuya phone app works fine.
But now they seem to build a Homey app themselves.
This is the latest update from Athom
That sounds like Athom advices to buy a Tuya zigbee hub to control any Tuya zigbee device from the upcoming official Tuya Wifi app 
Might be, It’s just very affordable stuff or, often the cheapest available, but not the best or the most compatible, and not the only smart home brand.
Don’t get me wrong, I do have many Tuya devices, but for zigbee I chose zigbee2mqtt as controller. It supports lots and lots of Tuya zigbee devices, amongst other reasons to use it.
https://zigbee.blakadder.com/zha.html
