Hi,
You’ll need to install the Tuya Zigbee test app. Look at it as pre-release app. It supports loads of new devices.
At the app store page, tap on “Changelog”.
Next, tap on the orange button called “Test”.
Next, install the app.
Next, the Zemismart app is pretty recent, just contact the app developer to report your findings.
Contact info → see homey.app store app page
One advice: stay away from Tuya (rebrands, like Zemismart);
Why?
Flakiness with zigbee: Exactly the same supported model can run different firmwares, resulting in one working device, and one device not getting recognised by Homey.
.
Yeah, the brilliant sales part of that: they didn’t publish a listing of those 
You’ll have to search the app store for supported devices.
Note: when a brand appears @ app store, it doesn’t mean all of their devices are supported automatically.
One recent improvement though: certified Matter devices, following Matter specs, don’t need apps to function.
