If you're a Free-to-play player (Battle Royale) than you can't earn trophies as those are tied to the PVE mode (Save the World).Based on your linked PSN account, Fortnite does not even show as a game you've earned trophies in on PlayStation.com either: https://my.playstation.com/profile/xray_o_0/trophies
So I have no idea, unless you have the wrong account linked.