See:
If your AirPods or AirPods Pro won’t connect
Put AirPods Pro in pairing mode
Place both AirPods in the case and keep the lid open
Press and hold the small button on the back of the case until the status light flashes white
This resets them into pairing mode so your laptop can discover them
On your Surface, add the device
Settings → Bluetooth & devices
Turn Bluetooth OFF
Wait 10 seconds > Turn it ON again > Click “Add device” > Choose Bluetooth > Keep the AirPods case open beside the laptop
Reboot Surface