CheckMK 2.1 - Missing graph_export.py

I’ve upgraded CheckMK version from 2.0 to 2.1

Unfortunally the graph_export.py view that I used for exporting graph data to json, is missing.
Even in Interface, the option “export as JSON” and “export as PNG” are missing.

Is there another way? Has the OpenAPI an endpoint for them? I can’t find anything usefull googling.

Thanks.