We have surveys in which there can be for some rows in a list, no answers, thus no data. We are not able to use Arcade yet (10.7.1 AGS), so can't filter them, and I can't see a way to discount them from display.
I was thinking you could set a filter which provides a query similar to a definition query in ArcMap or ArcGIS Pro. Not sure about the hosted feature in Dashboards or Survey123. Can you view it in your ArcGIS Online content? Possibly make a view of the data? Use that for your dashboard?
