There seems to be a connector for GA4 data now, unfortunately, although it works in the Power Query, as soon as you click 'Close & Apply' it fails with an error.
Error:
...
The reported issue was solved with the new Version: 2.118.828.0 but there is still the following issue when publishing to PBI service.
And the folllowing error when trying to upload.
Lets keep checking for updates until this is solved.