Import Excel to Subitems

It would be great to be able to import a spreadsheet to sub items. This would be usefull becuase it allows us to have different columns in the sub items. For instance…

I have an item on a board for ordering material, one of many different things related to an install. I’d like to be able to import our material list as sub items under that so I can check off on what items have been ordered or what items need to be ordered.

I have a board for managing Professional Services activities.
Each Item is a project and it’s sub items are the detailed activities.
Previously we managed this using sheets, and we want to import al that data into Monday.

Unfortunately there is no convenient way of importing data into subitems.