sharepoint based dashboards

i went a level lower and picked the master list i think this report is based on.   from there, picking intergtae , pbi and then write report actually does show what looks like a more relevant model.   but i still dont see a way to add logic like the 20 or so appplied steps i see in the pbix.   i dont even see a way to get to the screens where i can add columns, lookups, applied steps etc like you get with a normal pbi report's semantic model.  interestingly, between last week and today, the ws disappeared on me in the cloud.   so i had to request/get access again .  and for the user who had the issue in the first place, i asked him too to go down one level and actually pick the master list and hit integreate etc again and he now sees what he wanted.   i think the big question right now is how did the original author get this report created in the 1st place?  there dont seem enough familiar pbi icons showing in case i ever had to do this.   most interesting, the guy who created these reports left the company.