Hi,
Thank you for reaching out, and I appreciate your patience.
Please note that this is a public forum, I will be responding you in short period of time and regret for a delay in response. As I am merely a fellow user trying to provide insight and information that may be helpful to others.
To better understand the issue, may I ask:
Have you tried connecting other Bluetooth devices aside from your mouse and wireless earphones to help isolate the problem?
What is the make and model of your device?
You can check your system details by typing MSINFO32 in the search bar and pressing Enter. A screenshot of that window would be very helpful.
In the meantime, you can try these steps:
Run the Bluetooth Troubleshooter
Go to Start Menu > Settings > System > Troubleshoot > Additional troubleshooters
Select Bluetooth, then click Run the troubleshooter
Reinstall the Bluetooth Driver
Press Windows key + X and select Device Manager
Expand the Bluetooth section
Right-click your Bluetooth adapter and select Uninstall device
Check Delete the driver software for this device (if available)
Restart your computer and test Bluetooth again