Sidecar Icon Missing from Menu Bar
I know some of you have raised this question so I am posting this for the benefit of anyone who ran into this issue as I have.
To bring the Sidecar icon back into the Menu Bar, (which mine disappeared after one of the Big Sur updates 11.6 I believe):-
- Go to System Pref
- Select Dock & Menu Bar
- On the left pane select Display
- Check "Show in Menu Bar" on the right pane
- Display icon is now visible in Menu bar, with the option to enable Sidecar for iPad when clicking it