The Arcade expression used in Map Viewer to adjust the symbol size, incorporate the $view.scale variable returns the error, "The layer is not providing enough information to change the drawing style."
This issue is not reproducible in ArcGIS Online Map Viewer. If the issue persists, contact Esri Support Services as additional information is required for further investigation.
解决办法
Use Map Viewer Classic or create the map with all expression in Map Viewer Classic before bringing it into Map Viewer. However, the expression are not reflected elsewhere such as in ArcGIS Field Maps.
Employ the 'Adjust size automatically' option when changing the symbol style in Map Viewer.