Connect to Analysis instance of PBI desktop
We could connect to Analysis instance running 1200 comptability level through Power BI desktop
Once u have some data imported into the PBI desktop model navigate to
%LocalAppData%\Microsoft\Power BI Desktop\AnalysisServicesWorkspaces
and look for msmdsrv.port text file to find the port number the PBI desktop is using for running the Analysis server under the cover.
Then u can connect the the data model either through Excel or SSMS and browse the model