Here’s a trick that helps a bit. If you open two views of Safari side by side, you can open different bookmark folders in each pane and drag bookmarks between them. Be careful to drop the bookmark on an empty part of the list, or you may accidentally replace the destination Safari pane with the bookmarked site, or open the bookmark in slide-over.
May take a bit of practice. Take notice of how the dragged bookmark changes as you move it over the list, the way it drops onto the list shows you when to let go.
View attachment 89201