PowerBI report builder

Hi,

Is there a dedicated forum for PowerBI Paginated reports / report builder? I find people answering questions in PowerBI Desktop -terms when I am asking about paginated reports. I understand these are not 100% different, but they're also definately not the same. 

For example i currently have an issue: How do i set a parameter to filter 2 different datasets at the same time? I want the user to set parameter "134", which would show only items related to 134 from 2 separate datasets.  Apparently relationships built in PowerBI don't propagate to PBI Report Builder / Paginated Reports.