Custom Columns not exporting to Excel

I have used the following post (Adding Columns to Existing Grid in Kinetic) to add custom columns to Epicor, and it is great. My issue is that when I export the grid to Excel, the custom columns are not being exported.

We are using Epicor Kinetic 2024.1 is there something I am missing or is it just not possible in this version?

Hmmm… Adding Columns to Existing Grid in Kinetic - #18 by Hally