i think they meant XBox support via USB only (which does work well after a firmware update) and not bluetooth, on their forum they say it is impossible as XBox doesn't support bluetooth. I thought they would be doing a workaround, ie using an intermediate program to spoof Windows into thinking there is an XBox pad connected sort of like you get with the Tincore mapper.
Other solutions like x360ce have been hit and miss for me and I was hoping they would have a rock solid way of doing it. Still I suppose there is hope for the future if enough people request it, they have released a few firmwares with new features and bugfixes already. I've ordered a new OTG adapter and retractable cable already so I may hang on to it.
XBox support via USB is done by holding power + R1 and then connecting the controller btw, it shows up in Windows as an XBox controller. The analogs work quite well, a lot better than I first thought after testing them in Windows.