@DevinD16607791 if you want to use the joined class as filter, you will have to use sub report. With class joining columns, you can only add those to the query. In the sun report you will have option to use the joined class columns in the filter. Also you will have to save the Report to your app ruleset and test. You can use branch for testing. Pega ootb rulesets will not have access to your app rulesets. RD should in your app ruleset.
Hi @DevinD16607791: I could see that the rule is still in Pega ruleset. I hope you are trying with a private edit. If you are planning to specialize the rule, can you save it to your app ruleset first?