Arcade is an incredibly useful option within ArcGIS Dashboards, and I use it all the time. Something that would make the experience even better is if there could be a search function to look for variables when building arcade expressions within the advanced formatting windows, e.g. in the list element.
At the moment, if the feature service that I'm working with has a large list of global variables available e.g. $datapoint.xxxx then I have a huge list that I have to manually scroll through in order to confirm the name of the specific variable that I'm looking to use. A search function would make this much easier, and faster!