The hierarchical system of nestable folders is very useful, but it has not only advantages. One disadvantage is that deeply nested folders sometimes cannot be found quickly enough.
Instead of always having to use the search function for this, it would be useful if folders could also be favorited and, in addition to the currently existing "Quick Links", "Folders", "Tags" and "Trash" sections, another one called "Favorites" was available in the left sidebar, in which favorited folders appear. This would ensure quick access to frequently used folders.
The Finder in macOS or the Explorer in Windows may serve as a model here.
This is a concretization of the request from six months ago that was designated as "on to-do list" by the support team. Is this feature still on your list?