I've never tried getting the built-in/included Bluetooth on these motherboards working. I don't know what's needed.
I've only tried using Apple made Wi-Fi Bluetooth cards, Dell DW1560, and Dell DW1830 working.
For the Apple made cards, once you have USB working, nothing else needs to be done.
For the Dell DW1560 and DW1830, BrcmPatchRAM kexts are needed to dynamically update the firmware so that they are compatible with macOS.
Looking at your screenshot, my guess is that the Bluetooth isn't fully compatible with macOS. I don't know if the BrcmPatchRAM kexts will get them working because, again, I've never tried...