I quite often search for a notebook (Cmd-P). After selecting a notebook it is selected and its note list appears.
I feel like the default when selecting a notebook should be to focus on it in the Sidebar.
Having searched through the Features topic, I found this post and now realise that focussing the sidebar will focus on the notebook: show-a-notebook-automatically-on-a-note-focus/18840
That's helpful, but I think the behaviour would be better if it focussed automatically after searching and selecting a notebook.