Zigbee devices have individual “fingerprints,” and if the system hasn’t seen the one for your device before, it won’t know which device type handler to use for it. So they are “compatible” but still might require extra work to get them integrated.
The first question is exactly which motion sensor DTH did you try to use? There are several available.
That’s why @jhamstead is suggesting that you start by trying the custom code that has already been developed for a different but similar motion sensor, the one from Hue, to see if your trust device will work using that custom code. You won’t know until you try.
If you haven’t used custom code before, it’s pretty straightforward: basically you were just going to copy the author’s code and paste it into your own account. Then you will edit the system entry for your Motion sensor to use that new code.
Here’s the FAQ for that process: