Expand JSON with nested data + inconsistent structure - not working

I’m having this problem too.

My JSON has three properties, each of which has nested data, but only one property has a value for each record.

I’ve tried filtering, to get rows that only have a value so that I can then Expand JSON further. But, no joy. The source column is empty - when I can see in the API response that there’s a value.

Do I need to somehow “tell” Parabola where to look for the data, like a path or something. I can’t see any way to do this?

Thanks!

Dave