Adding/updating rows into Google Sheets in the middle of a document

Hey everyone — hoping someone can help crack this.

I’ve got a Make scenario that:

  1. Uses a webhook to trigger creation of a Google Sheet from a template
  2. Populates the second tab with line-item data via Make (iterator + aggregator, working fine)
  3. I then need to push that data into the `first tab, starting at cell B27
  4. The number of items varies (1 to 10), so the row count must be dynamic

What I need:

  • A clean way for Make to populate the first tab starting at B27, dynamically adding rows (or unhiding them if this way is easier, but it seems that I need to start diving deep into app script if I do it this way), based on how many items come through
  • All of this must happen on the copied sheets from the template, not the original template - I have dipped my toes into the Ap Script to try and fix this, but the App Script doesn’t like making the same changes to a copied sheet.

What I’ve tried:

  • ARRAYFORMULA – clean but doesn’t unhide rows or add space for PDF export
  • Update Row, Add Row, Update Cell, Bulk Add & Update Rows modules in Make – none allow row-level targeting starting at B27 - it forever adds the data into row 1 or 2
  • Google Apps Script injection – blocked by OAuth and token issues
  • Hiding rows below B27 in the template – but Make doesn’t unhide them when populating
  • Can’t use empty pre-exposed rows because the document gets exported to PDF and must look clean

Happy to share screenshots or links — just desperate to get this solved. Any help would be amazing as I have been stuck on this for days now.