Hi Alex,
Normally, it is not necessary to use any Zigbee sniffers for new devices. I use a sniffer very rarely, in fact, I haven't used it for more than one year, until last week, for a very specific need.
I can recommend you to purchase the new Zemismart M1 Zigbee/Thread/Matter hub if you don't have any Tuya gateway yet. Then make a Tuya 'developer' account following the links in this thread. When you get the new unsupported Tuya device, pair it to the Tuya/Zemismart hub. From your tuya.iot.com you can see enough details about which 'data points' are used by this device for what function. Normally, this is enough information to add support for a new Tuya device in HE. Also, searching GitHub for this device model/manufacturer almost always reveals enough information too - ZHA / Zigee2MQTT / deConz guys are usually a few weeks or a few months ahead... with very few exceptions : )
