How to integrate data individually over a repeated array of surfaces?

Hello,

I have grouped multiple surfaces (i have 36 of them that come in an array like geometry, think of multiple cylinders in a row) using GroupedDatasets and selected them using Extract Block.

I use integrate variables to integrate the heat flux over each cylinder, hoping to have a sheet with each cylinder integral in a row, but although I have the grouped blocks, im getting the integral over all the surfaces, and doing it surface by surface is a pain.

How can I proceed?

Thank you!

Please share your data.