How can I display Tasmota data?

The Homey Tasmota MQTT App supports just some standard capabilities/devices:

The current version of the application supports on/off capability for single or multiple sockets devices, power monitoring, dim, light_temperature, light_hue, and light_saturation capabilities for single socket devices.
(Source App Store)

If you haven’t imported any Tasmota devices with the Homey Tasmota MQTT app, you can delete this app.
To import devices from HA into Homey, please use the Homey Home Assistant Community App.
If you have any questions about this app, I recommend using the corresponding topic.