Amstellodamois

Exactly the sort of information I was looking for, thanks @Kilrah! My motherboard manual doesn't say which key it uses but I bet it's the M key, so I'll buy the PCIe adaptor

I was hoping to install it on my motherboard's M.2 directly

I mean something like this. The same Intel chip without the PCIe adapter:

I plan to buy a chinese card with the Intel AX200 module. I can go barebone or PCIe. The PCIe is just an adapter that does M.2 -> PCIe. These adapters have a port (see attached) supposed to be connected to a USB header on the motherboard for Bluetooth 5.0 connectivity. Question, then: if I buy the barebone version and antennas, will I get Bluetooth nonetheless?