Help in mapping

Hi Makers! I am trying to create an automation for extracting data from receipts. The webhook is working fine no issues and creating the bundle. i have no isse connecting it to the google sheet. WHen i do the mapping i have no issue adding the date, vendor, totat amount etc. WHat i do have issue is to add the line item into a cell. For some reason it will only add the firts item but doesnt want to add the rest.
My goal would be to add all line items in the receipt to one cell together with the price. (maybe under each other in the same cell)