This is the correct reason why Bluetooth works for me on 4.19 kernel but not any 5.x! My fix is to add a systemd service to set the Bluetooth device...
You will also find that both your new and old drives now have the same UUID's, so it can be a little bit dangerous to operate the computer with both...
Well, considering you just installed, why not install again?
And then NOT "uninstall some things" because of the WiFi. If you're having problems ask...
