Hello sapiens, having not found a clear end-to-end article about building webhooks on native cloud, I decided to write one for GCP. Not as advanced as the plugs I see here but I hope it helps someone in need:
https://bishspace.hashnode.dev/building-webhooks-using-google-cloud-run-and-python
Specific highlight on the new BigQuery Subscription from Google Pub/Sub which is a very useful feature. You can edit existing pipelines and not have to create a whole new Dataflow.