Are you sure you aren’t confusing a List Style layout vs and Inline List??? Inline List components have never shown the All/Favorites tabs. All/Favorites only shows when the tab layout style is one of the list styles.
I still don’t fully understand what you are saying. You would never display a list as a detail…it’s a list… When you click on a list item, then you are viewing the details. I think you need to be aware when you are looking at the tab layout vs the inline list component layout.