Using Power BI to access indicators/investigations/actions ATP API calls

Hi, I'm trying to call the indicators/investigations/actions APIs from Power BI - the calls are "working" but not populating with data. Using same creds I can pull data successfully via API explorer and for actions/investigations Power Automate (Flow) also works (same set of creds).

Need to fix this but not sure where to look next.

Any ideas ?

Thx Geoff