Thanks for all your responses!
So I was right with appsupport, you confirmed it has no access to hardware (usb, bluetooth, wifi).
I thought about a model with simultanious thermal and overlayed normal image, like Topdon TC001 Plus or ToolTop T7Pro. They are no longer more expensive. But of course displaying everything correct is more tricky at least.
But because of @simosagi comment, I may be out of luck anyway.
Can anyone else report about compatibile thermal cams to thermalcam app?