Choose my own custom folder name on import

Elements 2024

I can't find a way to add a custom subfolder name format for use on import.  The Advanced Dialog has a number of options but they all include the day dd.  I prefer to store my photos by month, preferably in the form yyyy mm.

Custom Name takes the actual characters you type into the box.  Custom Groups (Advanced) has a lot of further options, but not the one I want.  Can  I create a new format anywhere?

To be clear this is only for the subfolder name being created on import.  I don't want to change the filenames.