When I ran the API call using the Try It button (my personal token) and also in Power Query, it returned all the data (559 rows), however, when I ran it with the Service Principal token in Power Query, it only returned a small subset of the data (36 rows).
If I understand correctly, it seems that it can't return the entire data, only return part of data when call REST API Datasets - Get Dataset To Dataflows Links In Group. The problem could be due to the permissions associated with the Service Principal. The Service Principal will have access to the data only if it has authorization on that workspace. Please ensure that the Service Principal has the necessary permissions (Dataset.ReadWrite.All or Dataset.Read.All) to access all the data.
Community Support Team _ Rena If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.