I had the same problem, could pair my airpods as a bluetooth device but could not select them as an audio output. It was driving me crazy...took a lot of troubleshooting but here's what worked for me:
- Go to Device Manager
- Expand "System Devices"
- Find AirPods Hands-Free AG (Mine was labeled "Airpods Pro Hands-Free AG")
- Right click and open up "Properties"
- Click the "Driver" tab and "Disable Device"
- My PC prompted me to restart but started working right away.
Prior to this, I had done all the recommended troubleshooting and nothing worked!
- Overall PC reboot
- Unpaired and repaired AirPods to PC...toggled Bluetooth on and off and tried this again
- Used windows audio troubleshooter
- Confirmed I have the latest audio driver
- Confirmed I'm on the latest apple firmware for my generation
- Confirmed that I can connect other audio devices (Bose Earbuds, JBL Headphones, JBL Speaker, Amazon Echo) and select them as audio outputs
- Disabled all other Bluetooth devices except the AirPods in device manager
- Troubleshoot live with a Lenovo support rep
Hope that helps!