Loop over records multiple times when exporting

Hey all, I've made a custom export but I've hit a wall trying to figure out how to loop over the record multiple times and output the data. I have a column that stores data as JSON and would like each entry in the JSON column to be a new row in the csv. The first image is what it currently outputs as, with all the JSON data in one cell whereas i would like to achieve the output in the second image. Thanks