As of now, the microsoft marketo powerbi integration is depreciated, Connect to Marketo with Power BI - Power BI | Microsoft Docs - therefore we have no way to integrate Marketo data into PowerBI out of the box.
Will Marketo be releasing a new template app to support integration into PowerBI?
"We'll be deprecating this content pack on September 4, 2019. If you installed this content pack before then, it will continue to work, but you won't be able to install a new one after that. Template apps are the replacement for service content packs."