This article explains additional Portfolios pages.
Board
The Portfolio Board page shows each plan in column swim lanes. You can change your groups and choose to include/exclude additional fields on the plan cards.
Roadmap
The Portfolio Roadmap page lists out each plan in a roadmap timeline.
Portfolio Dashboard
The Portfolio Dashboard page can include different reports and charts. The PowerBI OnePlan Report includes tabs along the bottom with key portfolio health, financial & resource plan data.