How can I make one report refers to another?

Hello everyone I am begginer with Power BI, so I have a few questions about it:

1. Is it possible to make one report refers to another? I have two reports A and B. When I tap on some graph on report A report B will appear with some different graph.
2. When I linked two dashboards, both of them were visible in user mobile app. How can I hide one of them? So user will see only one dashboard, but when he tapped on it, another dashboard will open.
3. There are many cool examples of dashboards in mobile app with icons How can I make dashboards with icons?