Android phones don't need (and often don't have) upstreamed "drivers". They use qualcomm's closed-source code. Also, Android user land driver (HAL) isn't useful for non-Android Linux distros.

Yes, with proprietary blobs. Oh, and also running a version of the Linux kernel that’s been out of support for years (on some devices, not all).

This is the danger when you don’t upstream your shit. Now you’re stuck on kernel 3 or 4 because your chip vendor is lazy. And Qualcomm has got to be one of the laziest.