Filter Project Sidebar by ‘On the Agenda'

I don’t remember exactly, but I tested those filters at the clock at the bottom once and then forgot they even existed.
At some point, I created my own smart views, “Edited Today” and “Last 2 Days,” which work for me.
The “Edited Today” filter at the clock at the bottom unfortunately returns incorrect results. Right now, the “Edited Today” filter shows me 4 projects, but I’ve only edited one note from a project today. As expected, there should only be one project on the left side of the list.

A Note:
I think there’s a description of this feature here:

Unfortunately, I couldn’t find anything about it in the “How To” category of the community. Please add it.