HTC Cosmos has been reported as the worst tracking device on the market and its quite unpopular, I bet Ralf hasnt even considered it to include it.
I dont know much about it, but it might count as WMR device, so wme controller might work on top of that steamvr has rebind feature and if you run a game with vorpx, then go to steamvr rebind list and find vorpx there is an option in one of tabs of rebind menu to “act as vive, rift, index controller” or something, havent tested it myself but it might be what you want.
Lastly there is a software to emulate gamepads/wheels/hotas on controllers here you might try it, basically same as worpx does.