Before inbox categories were added, I had a "Payments" folder already set up and well-sorted, exactly like the new Payment category. I would like to move the entirety of its contents to the inbox under the Payments category so I can take advantage of auto-filtering already provided by Proton.

Selecting all mail in the folder and then attempting to "move to folder" only shows the primary inbox as an option, without the option of moving to a category. Dragging the folder from the sidebar to the category in the webapp does not work.

It would maybe make more sense for inbox categories to be an option to move to from any view or folder.