Can't See Bluetooth Mouse
I have a bluetooth mouse that I had successfully connected to a MacBook Pro running High Sierra 10.13.6. The mouse worked perfectly fine for several weeks. I removed the mouse from the Bluetooth menu a few months ago. Now I am trying to reconnect the mouse to the MacBook Pro. On the mouse menu, the computer never sees the mouse. If I go to the Bluetooth menu the computer can see the mouse and connect to it. After this though the mouse still doesn't show up in the mouse settings menu. Lastly, if I turn the mouse off, when I turn it back on the computer won't reconnect to it. I have to remove the mouse from the Bluetooth menu and re-pair.
I have already tried the following troubleshooting steps.
Reset NVRAM or PRAM on your Mac - Apple Support
http://osxdaily.com/2015/12/15/reset-bluetooth-hardware-module-mac-osx/
This mouse works with no issue on my Windows Surface. And yes, I have made sure that the Surface is off when trying to connect to the MacBook Pro so that there are no interference issues.
MacBook Pro, macOS High Sierra (10.13.6)