Assigned Person as Deal Participant but under Person Overview doesn't show any Open Deals it is linked to?

Hi All,
I’ve created deals and created persons and linked the persons as participants to deals.
When I navigate to the person overview page, it shows that the person is linked to the correct deals. However, directly above it is the “Open Deals(0)” stats and it shows 0 deals.

What do I need to do when I create the person so that this will be fixed?