CheckMK 2.1 - Missing Export to JSON

Question

I've updated CheckMK from 2.0 to 2.1 and seems like the graph_export.py view has been removed. I used it to get grapha json data.

From interface, the export options is missing too (image from 2.0).

I've read something about an endpoint in OpenAPI but from 2.2 version.

Is there any way to get json graph data with 2.1?

Thanks.