Oh indeed 2020 will be incredibly hard to beat, but I think Sony may have a metric buttload of cards up their sleeves that're just waiting for a showcase to drop bombs. For the record, here're all the first party, timed exclusive, third party exclusive and just generally console exclusive games PlayStation had in 2020:
Ghost of Tsushima
Final Fantasy VII Remake
The Last of Us Part 2
Marvel's Spider-Man Remastered
Marvel's Spider-Man Miles Morales
Nioh 2
The Pathless
Godfall
Demon's Souls
Dreams
Sackboy A Big Adventure
MLB The Show 20
Astro's Playroom
Paper Beast
Granblue Fantasy Versus
Bugsnax
Iron Man VR
Predator Hunting Grounds
Fall Guys
Genshin Impact
Spelunky 2
So far for 2023 we don't have nearly that much, off the top of my head we've got:
Spider-Man 2
Horizon CotM
Horizon FW Burning Shores
Forspoken
Final Fantasy 16
RE8 PSVR2 mode
2 live service games launching before the end of the FY (guessing TLOU MP and Helldivers 2)
MLB23
Destiny 2 Lightfall
Stellar Blade
Firewall Ultra
That's plenty of opportunity for more content to be added to that list, we'll just have to wait and see. For now, it's a good start. Silent Hill 2 Remake could release next year. It's not impossible that FF7 Rebirth could also drop in 2023. Little Devil Inside could also make it. Who knows what else.