data model management within pbi service

Hi

I understand that durring pbix publish, its data model is exported from the pbix file into an instance of SSAS tabular 

where it is managed by the pbi service - right?

This is also true where a pbix model uses a direct query connection only - where no data is actually managed within pbi?

So regardless of connection type (import or direct query) - a model would still be managed within SSAS ?

P.S - I assume this is also the case where the pbix publish is done to an on-premise power bi server?

Thanks a bunch

Rea