Accessing datalink fields in Arcade Expressions

Hi,

I have data containing codes for Threatened Vegetation, Flora and Fauna. I have datalinks set up to a lookup and cross-reference table to show more detailed information but not all features have all datalinks.

I would like to be able to access the datalink fields in an arcade expression so I can show the value in the Feature Description if it is not blank. If it is blank, it should show nothing for that field. It currently will add a blank line which makes it messy and confusing.

A colleague asked support in November 2020 if it was possible and although the response 'there is no documentation detailing how to do it' gives me hope, I'm just not sure it's currently possible, but it would be an awesome feature.