Shake a file while you drag it and a floating shelf comes to the pointer, wherever you are on the screen.

Built into Ledge for macOS.
How hard you have to shake is up to you. Shake again, or use its shortcut, to bring it back.
It slips out of the way a few seconds after the pointer leaves it.
Open more than one, and keep them in step with the notch's shelf if you like.