Open Settings > Bluetooth & devices > Select Galaxy Buds > Remove > Reboot device > Repair.
Go to Settings → System → Sound → Output
Manually select the Galaxy earbuds from the dropdown list
Go to Settings > System > Troubleshoot > Other troubleshooters.
Run both the Audio and the Bluetooth troubleshooters.
Uninstall and reinstall Bluetooth driver.
You may try Galaxy Buds app for managing and personalizing your Samsung Buds devices
https://apps.microsoft.com/detail/9nhtlwtkfznb?hl=en-US&gl=US