We have a hosted feature layer in ArcGIS Online from which we have created a number of hosted views. The Enable editing option is disabled on both the hosted feature layer and the hosted views.
We have found that once either the feature layer or the hosted views are added to ArcGIS Pro then the end user can edit the layer and the edits write back to both the hosted feature layer and hosted views. We have tested this with users both inside and outside our organisation and have found the behaviour to be the same.
Does anyone know why this is happening or how to change it so the online layers are not editable?