To customize sidebar or footer widgets, navigate to Appearance -> Widgets. Here you can find 4 sidebar areas: Blog Sidebar, Page Sidebar, Shop Sidebar, and Footer columns.
WordPress is currently in the transition from traditional widgets to block widgets. In the Sedona Shop theme, we utilized a new way of using widgets which is block widgets. This approach gives you more freedom to arrange and customize widgets’ content.
So all the traditional custom widgets that you can see are basically redundant at this point and will be removed at some point in the future. We highly encourage you to use block widgets instead.