Okee, so that got me indeed data in that report. So already thanks for that. But it's not the one we want. On the dashboard screen you have the possibility to add several reports, one of them is the deployment overview report. It's that one we need. So if there's a rest-api for that one, we will be very happy.
If not, we can create it ourself through different rest-api calls, but as said, it would be easier with only one call .
here is a screen shot of the deployment overview report: