Triggering on board changes in custom app trigger

I’ve been trying to create a custom automation with a trigger that lets a user map columns on the monday board to an external data source. This works fine for the mapping, but what I’m wondering is whether there’s some way to include the same functionality of the built-in “when column changes” trigger to my trigger, so I can say something like “when column changes, take the info in mapped column 1 and mapped column 2 and…” and pair this with an action block.

As far as I know, this was not possible before, but I’m wondering if something might have changed.