Hi manoloag,
I have runeaudio working well on any hdmi device
The local UI gets displayed on a locally connected HDMI monitor?
If so, you have to connect your TFT to the standard console.
In case of PiTFT it can be done with "con2fbmap".
If you need more help please provide more info about your setup.
- Pi version
- Rune version?
- TFT (brand and type)
Frank