I've been experimenting with using Arcade Expressions to show unique symbols for different features in a layer. However, when applying it to a hosted feature layer in AGOL, it makes the layer un-selectable in Map Viewer. Instead of displaying the pop-up set for the layer, it's skipped entirely. Even when I revert the default style of the layer (set in the Visualization tab of the layer page) back to a style based on a field and not Arcade, it still isn't select-able.
The expression breaks the layer into 3 different styles, 'BVWD', 'USBR', and 'Unverified'. The first 2 styles depend on the value of a field called 'LATERAL_ID', while the Unverified style is dependent on the value of the field 'IS_VERIFIED'.
Here's the Arcade expression: