In order to map the Bluetooth part of your wireless device,
I think it is best to create a resource mapping,
It is possible to create a resource mapping via Datacenter> resource Mappings,
This so that the then later this mapped resource can be added as hardware in the the VM.,
To map the bluetooth part of the device go to Datacenter> resource Mappings "USB Devices"
Choose "Add" and In the menu "Add USB Mapping" check the button "Use USB Vendor/Device ID"
Here the bluetooth device should be available, and you should be able to select the Device:
Note when selecting the device that you will also need to select the correct NODE if you use a Proxmox cluster.
Example:
Datacenter> resource Mappings:

Note this device is possible only showing as a "wireless device", but be clear that the USB part is the Bluetooth part.
You should be able to find the device and the USB Bus it is on using the "lsusb" command on the shell of the PVE node.
if you have issues with finding or starting the the bluetooth/wireless device here,
note that it is possible that you have assigned the particular USB bus to another VM,
Kindly note that USB "Bus 001" would need to be fully available to the single VM that you want to map the bluetooth to.
Note it is not possible to split a USB controller over multiple VMs. Proxmox does not like that.
So determine the USB Bus ID which holds the Wireless_device (In this example Bus 001).
and assign it to the VM that you want to let use the bluetooth.
Making sure that no other VMs have any USB devices mapped that have this Bus ID.
The network part of the "wireless device" is handled directly via the PCIE lanes of the M.2 slot.
that holds the and thus this part will show in lspci.
These can be mapped as well using Datacenter> resource Mappings.PCI devices>add.
If both resources are mapped then you should be able to add the hardware in the VM
via:
Hardware> add> Usb device and choosing the Mapping you have created for the bluetooth device.
And for the WIFI network part:
Hardware> add> PCI device and choose the mapping to the WIFI part.
I hope this helps someone a little bit,