The official Tuya app is cloud only. It relies on your zigbee devices being connected to a bridge in the SmartLife app.
INSTRUCTIONS
The Tuya App for Homey is compatible with both the ‘Tuya Smart’ and ‘Smart Life’ apps for iOS and Android. Before connecting your Tuya-enabled devices to Homey, ensure they are first linked to one of these apps.
There is a community app that allows you to connect Tuya zigbee devices directly in Homey currently in test. [APP][Pro] Universal TUYA Zigbee Device App - test
https://homey.app/en-be/app/com.dlnraja.tuya.zigbee/Universal-Tuya-Zigbee/test/
Besides that, there is always the option of using zigbee2mqtt, but this would involve a more complex setup requiring a zigbee dongle and the zigbee2mqtt service running on another computer, an MQTT broker and the zigbee2mqtt app on Homey.
