If the “pins” you’re seeing are in File Explorer’s “Quick access” (Windows 10) / “Home” (Windows 11) area, that’s normal: it simply means those folders were pinned to Quick access, so they’ll stay there until you remove them and will generally appear above the “frequent/recent” items.
To remove them: open File Explorer / in the left pane under Quick access, right-click the folder / Unpin from Quick access.