Hey @daniellanger,
If you haven’t already, I would suggest taking a look at the comment I left in the below Community post where you posed the same question:
This currently is a limitation pertaining to the undocumented flows V1 endpoint. Since our Product Team is looking for feedback as they actively work to introduce V3 of our API endpoint, I’ll share your use case and details with them! I know that from speaking to that team that improving upon these originally undocumented Flows V1 endpoint was a big focus for them.
If you haven’t already, you can also sign up to be an early beta tester of the V3 API endpoints and uncover some of these new improvements by joining our V3 API Beta List here.
David