Even if the "System Model" is blank, the often contains the actual model number. Press Win + R , type msinfo32 , and hit Enter. Look for BaseBoard Manufacturer and BaseBoard Product .
How to Fix "To Be Filled by O.E.M." Bluetooth Driver Issues on Windows 10 (64-bit)
If you can't find the motherboard model, identify the Bluetooth chip itself:
Since Windows isn't telling you the model, you have to look deeper into the hardware IDs or the "BaseBoard" (motherboard) information. Method A: Check the BaseBoard Model