Currently Print Widget (ArcGIS JS 4.13) does not support highlighting features?
Arcgis Server supports it (selectionObjectIds), ExportWebMap specification—Documentation (10.7) | ArcGIS Enterprise
So would it be possible get support for highlighting the features? or is there workaround getting it working?
You are correct, the print widget does not support printing highlighted features. One possible workaround would be to use the MapView.takeScreenshot() method instead of printing.
Another possible workaround would be to add a copy of the feature as a Graphic before printing.
Hope this helps.
I went solution of copying the objectIds of highlighted features in the client side and sending those to backend.
In the backend, I modified the query for ExportWebMap by populating selectionObjectIds array from the values which I got from client side.
Now highlighting features is working fine on the print.