@ShirleyLin I am not familiar with Power BI, But I found some documentation from Microsoft.
https://learn.microsoft.com/en-us/power-query/connectors/adobe-analytics
If Power BI online version lets you get data from online services, then you might be able to connect it to Adobe Analytics.
Select Get Data from the Home ribbon in Power BI Desktop. Select Online Services from the categories on the left, select Adobe Analytics, and then select Connect.
I Hope this helps!