How to upload file with files manager in mobile view?

I can’t figure out how to upload files via the file manager when using the admin in a mobile view. The drag and drop field is not there and the “+” button only lets me create new files and folders. Anyone?

Edit: Just to clarify: The expected behavior of an upload functionality for the file manager on a smartphone would similar to what happens when I hit grafik and then grafik in a media field of a module item.
On Android this would give me a set of options like pulling an image of the camera, choosing an image in the gallery or a file from the phones file manager. Same with iOS.

File upload is not supported on mobile devices at the moment.
We will add this in one of the next releases.
@Peter-Schmidt please add this to the public backlog.

Sure, added here: