Hi @SteveFaber I know this reply is kinda late. Since there’s no built-in connector for Ad manager to PBI, you would to look for other options. As a workaround, you can use a 3rd party connector, it can save you a lot of time compared to the other options. I've tried windsor.ai, supermetrics and funnel.io. I stayed with windsor because it is much cheaper so just to let you know other options. In case you wonder, to make the connection first search for the Google Ad Manager connector in the data sources list:
After that, just grant access to your Ad Manager account using your credentials, then on preview and destination page you will see a preview of your Ad Manager fields:
There just select the fields you need. Finally, just select PBI as your data destination and finally just copy and paste the url on PBI --> Get Data --> Web --> Paste the url.