Download and install the Bluetooth driver recommended by the manufacturer on the website;
https://www.asrock.com/MB/AMD/B850%20Pro-A%20WiFi/index.asp#Download
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.