

Unfortunately, If they did have onboard drivers it would only ever be for an old version of Windows. (Same as the disks and then later discs that used to come with hardware)
And in the case of phone hardware and features such as VoLTE it’s intentional so you’re locked into their OS.
I seriously miss having physical mouse buttons that can be felt when they click on a touchpad. I end up using a separate mouse on any laptop that I use regularly.