Hello, thank you for reaching out to Microsoft Q&A.
Here's what you can try first -
- Run the Bluetooth troubleshooter once and pair your Samsung mobile device.
- Go to Start > Settings > System > Troubleshoot > Other troubleshooters.
- Locate Bluetooth in the list, and click Run.
- Once the troubleshooter is finished running, restart your computer and pair your Bluetooth device again.
- Restart the Device Association service.
- Click Windows + R, type services.msc, and click ok.
- Locate Device Association Service > make sure the service is running and set the startup type to Automatic.
- If the service is already running, stop the service.
- Wait for a minute and then start the service again.
See if you can connect your Samsung device to your Windows 11 PC.
Let me know if you still need more help.