@Terry Riches 

You can copy paste cells from Excel into Miro, paste as sticky notes, and then convert the stickies to cards.  This will give you a ‘title’ of the card = to the value in the cell. It won’t however give you, say, a title AND description, as Miro cards support.  See video below. 

Oh, also: You have to convert the shape types in batches no larger than 30 at a time. 
 

can those cards be dropped into the Kanban?

@Terry Riches Not automatically…but they can be added/dropped manually.

What would better is where you can bulk upload a table, excel or csv to Miro Cards where it recosgnises additional data for inclusion in the card, rather than treating every cell as a new piece of data. 

At the moment, there seems no way to upload more than one piece of data to Miro as a sticky i.e., every cell = a new sticky. When you convert stickies to cards, every sticky = a new card. What would be more helpful would be if you have a simple table with headers like> Job; assignee; and deadline the data in this table would be ideal uploaded to cards where each row = a new card including the details of those rows assigned to the relevant fields of the template card, and every subsequent column/field of the text table is entered into the card text field. 

Yes, that would be great.