The Intel CNVi WiFi/Bluetooth card that comes preinstalled on this motherboard is not compatible with Mojave, but it's not necessary to remove the card. A natively-compatible BCM94360CS2 WiFi/BT card can be piggybacked onto a suitable PCIe x1 adapter (see Components) and installed into an available PCIe x1 slot. The CNVi slot, moreover, is not pin compatible with NGFF M.2 cards, but it may be pin compatible with NGFF Key-E M.2 cards. I have not tested this so I cannot attest to its suitability on this motherboard.
The Intel CNVi card connects Bluetooth to USB port HS14. And the PCIe adapter with piggybacked BCM94360CS2 module should be connected to the motherboard USB 2.0 header (F_USB) located next to the FAN_PUMP header. This header consists of USB 2 ports HS11 and HS12. A custom SSDT, applied in post-installation, therefore disables HS14 and enables both HS11 and HS12.