We just recently started displaying feature layer data from ArcGIS Online using esri-leaflet and esri-leaflet-renderers to actually draw the data on the map. It appears esri-leaflet-renderers was archived on Oct. 6th and is read-only at the moment. Are they retiring the plug-in and if so, any suggestions for other plug-ins to use. It doesn't appear to support labelExpressions, but there is an open pull request from 2019 where it looks like they had started working on it that we would like to have.