I am assuming you are looking at JIRA Portfolio plugin. You can have many projects in one portfolio plan. But you can not see multiple portfolios in one view.
There is no way to see it in Confluence as of now. Hopefully there will be some gadgets for this soon and you can put it in Confluence.
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
We're bringing product updates and pro tips on teamwork to ten cities around the world.Save your spot