Planner can only see old portfolios and not the new ones

Hi all, I'm the very new System Admin for my team. One user has the Planner level of access, and he was able to create a new project. However when he's in the Edit Project settings and he scrolls down to the Portfolio drop down, he only sees two very old portfolios to choose from. He doesn't see the newer portfolios that were created in 2020. He even clicked on 'Projects' in the global nav bar, and then selected the Portfolios tab. When I'm logged in, I see all portfolios. But when he logs in as Planner, he only sees two old portfolios and he doesn't see the new 2020 portfolios. Can someone advise which settings I should review? CD