For (still) unsupported devices, and if they’re paired to the TuyaSmart / SmartLife phone app, you can install them as “Other” Tuya device
and control them with an advanced virtual device and some flows.
Example for curtains/blinds/roller shutters
Adv. virtual device:
I created one with an Off/On control for Open/Close, and a slider control for position
Device settings:
Flows