I would like to ask you for consideration to extends webhooks functionality also for features (create, update, delete) in feature layers (hosted/referenced) in ArcGIS Online and Portal for ArcGIS.
For now, webhooks works with items. But it would be great also to extend it to features. We have several customers who would welcome it. It would benefit all customers who collecting data and where wider audience need to be informed about changes by e-mail for example.
For example - road check worker finds a damage on the road. He will put it to feature layer (by Collector/Survey, Workforce, WAB Builder application). At this moment only a manager of the data will see them. But the manager must watch it regularly (which is not possible all the time, very often, because of other work). If there would be a webhook for the creation, he would be informed by mail and thus it reduce his reaction time. Moreover, if such a damage would be serious, the webhook could inform Police and municipality office about the situation, so they could take a counteraction very promptly - close the road or inform public by municipality radio, etc.
Similar use case for example for sanitarians, when they found a new source of disease or some issue with spoiled food - they can (by webhook over feature) inform in a moment many other organizations involved in such issue by e-mail.
Thank you for considering this.