Finally had DW1820A working in my build.(Everything but Unlock with Apple Watch Feature) I taped several pins but I don't think they really matter.   Specs: a. DW1820A(08PKF4), 1028:0023. b. Asrock Z390 Phantom Gaming ITX.   Configs: a. Boot: brcmfx-driver=1. b. Devices: compatible with pci14e4,4353. c. Kexts: AirportBrcmFixup.kext, BrcmFirmwareData.kext, BrcmPatchRAM2.kext add to C/K/O. d. Make sure the USB port for the BLE was configured