Workflow is a service to orchestrate not only Google Cloud services, such as Cloud Functions, Cloud Run, or machine learning APIs, but also external services.
The new connectors for Workflows, which simplify calling Google Cloud services and APIs are here:
- BigQuery
- Cloud Build
- Cloud Functions
- Cloud Scheduler
- Google Kubernetes Engine
- Cloud Natural Language
- API Dataflow
- Cloud SQL
- Cloud Storage
- Storage Transfer Service
- Cloud Translation
- Workflows & Workflow Executions
https://cloud.google.com/blog/topics/developers-practitioners/introducing-new-connectors-workflows