We are talking solely PS2 first year games though so ignoring Halo and Mario Kart. You are talking games that came out the later end of first year of release too. If we're talking the first year of the PS5 until Q4 2021, you should also include upcoming releases for this Q4 for the PS5.
So for the first year you have Astro's Playroom, Deathloop, Demon Souls, Ratchet and Clank, Horizon Forbidden West, Destruction All Stars, Returnal, etc. for just exclusives. If you're going to add 3rd party, timed and Sony (PS4 and PS5 release) exclusvies, we can name a few more releases here.
But just for reference GTA3 was a timed exclusive, Resident Evil CV came out on the Dreamcast first, MGS2 was a timed exclusive. Having a bunch of shitty shovelware doesn't make the PS2 launch year good. It was a terrible launch year despite having a lot more games. But quality is better than quantity in this case.