The Variable Text formatter just slams the fields from each line of the CSV file into the variables laid out in the design, so you must duplicate lines to get duplicate tags.
If you’ll always have multiples of, say, ten tags, you can lay out ten tags with the same CSV variable to get ten identical tags from every CSV line. For reasonable numbers of identical tags, you could duplicate the lines by hand in a text editor and be done with it; having a few tags left over wouldn’t be the worst possible outcome.
The Ignore Empty Vars setting will get you close to where you want to go, but not quite all the way: