Me too, Mac/Steam. In my current save the icon is greyed out, though I was able to use it at the start of the save - sometimes. When I loaded the save, sometimes it was active, sometimes not. Now it's grey all the time.
I just started a random new save to test after the recent update, and the symbol isn't even showing in the menu bar (yes, I have the relevant box ticked in preferences).
It's wild that this is being ignored. Can we have some response please?