As a fairly on-and-off gamer, I can't really name any exclusive IPs from Sony.
I know Microsoft has Halo, and Nintendo has enough exclusives to make Smash Bros.
I vaguely recall Sony making their own Smash Bros a few years back, but none of the IPs featured in it have had any recent entries, nor are really that prominent.
While none of them are as popular as Nintendo's main series, Sony does have rather a lot of notable exclusive IP. LittleBigPlanet, Bloodborne, Uncharted, Ratchet & Clank, Horizon: Zero Dawn, God of War, The Last of Us, Gravity Rush, PaRappa the Rapper, etc.
Halo is popular, but Sony has a much larger portfolio of exclusive IP than Microsoft does right now.
I know Microsoft has Halo, and Nintendo has enough exclusives to make Smash Bros.
I vaguely recall Sony making their own Smash Bros a few years back, but none of the IPs featured in it have had any recent entries, nor are really that prominent.