To anwser the first question: Tuya Zigbee devices will of course be available through Tuya Zigbee hubs, the same goes for BLE devices. We are also looking into creating an official Tuya Zigbee App but with the vast amount of different devices it’s really hard for us to deliver top notch quality and ensure a good user experience.
And in regards to your second question; Yes, the official Tuya App wil be supported by both Homey Cloud and Homey Pro 
