I have a zigbee gateway. I use it for physical buttons that control other smart devices using the scenes in the Smart Life app.
The zigbee stuff has been the devices to give me the most trouble, plus they cost more.
Most of the affordable plugs and sockets are all compatible with Smart Life (which is just Tuya with another brand label). Quite a number of real cheap devices that have their own apps are also just copies of Tuya so they all end up working with Smart Life.
I am going to start looking into flashing firmwares. There’s SO MANY devices running hardware for those platforms, it would be great to break them free of the cloud apps.