Hi! Generally speaking, most PCs do not support bluetooth keyboards/mouses before the OS and their drivers are loaded. Very few support it, some Intel and Dell PCs or Apple Macs in example, but they have a special custom UEFI configuration for it. And that makes sense, because the Wireless/Bluetooth Card drivers are typically only loaded after the OS is running. I’m not aware that any Beelink PC supports it, but if they do I would also like to know.
I have a Logitech MX Keys keyboard and MX Master 3 mouse and similarly, to support their operation for the BIOS/UEFI and prior to OS load, you are required to use the Logitech Unifying receiver (USB dongle) connection instead of Bluetooth. I reserve the use of the bluetooth connection for laptops (they have their own keyboard).