The is a classic example of legacy hardware clashing with modern OS architecture. While Microsoft and Qualcomm have abandoned direct support, the workaround is simple: force-install the Windows 8.1 driver via the "Have Disk" method.
: Provides a specific Atheros Bluetooth Driver for Windows 10 (64-bit) that often works on non-Lenovo systems. Atheros Ar5b225 Bluetooth Driver Windows 10
Download the driver from a trusted repository (example – DriverPack or Station-Drivers may host it, but be careful). Safer method – Extract from a Windows 8.1 installation media: The is a classic example of legacy hardware