I see this too, on mobile the All Objects is a widget but on desktop All Objects is baked in at the top. Best to make it consistent, thanks for calling it out, I think it’s an oversight that should be addressed.
This was lightly touched on here "Invite Members" link must be optionnal or conditionnal , my preference is to move both the All Objects and Invite Members into the Space settings page instead of the widget sidebar. If a user wants to have an All Objects prominent on the widget they can add it, otherwise they can go into the Space settings to see All Objects just like how they can see All Types and All Properties in the Space settings.