First and most importantly, I updated the Power BI logo in the diagram to the latest version of the logo!
Secondly, I included Power BI Dataflows in the diagram tagged #6. Power BI Dataflows are used to ingest, transform, integrate, and enrich big data by defining data source connections, ETL logic, refresh schedules, and more. Data is stored as entities in the Common Data Model in Azure Data Lake Storage Gen2. Dataflow entities can be consumed as a data source in Power BI and by using Power BI Desktop. Read more about Dataflows here.
Click through for a full changelog and a link to download the architecture diagram and legend.