Rationale: for big trees it is extremely impractical to walk the tree and wait for all popups to show whether the blue icon actually includes Geni matches or only external matches.
Yes, you can find them throught https://www.geni.com/list/index but it's quite a hassle to go from one to the other.
In addition, there are bugs/impracticalities in the profile filter that make it impossible to unambiguously find all of them, see https://help.geni.com/hc/en-us/community/posts/12087414817687-Profile-filter-for-unconfirmed-matches-does-not-seem-to-work-correctly