In my experience configuring Experience Builder apps, the Sidebar widget is crucial for building logic and delivering a user-friendly interface. However, interaction with it is limited, most widgets can only open the sidebar, apart from buttons which can toggle it. Expanding this to include toggle, open, and close options for all widgets which can already interact with the sidebar would significantly enhance flexibility. In particular, being able to close the sidebar through an action would allow more dynamic, context-sensitive user experiences where relevant content appears or disappears based on user actions.
Please let me know if you would like anymore information.