As usual in their 2nd party games, there were way more PS Studios people working on Helldivers 2 than Arrowhead people, you can double check it on
its game credits. In AAA typically only around 10% or less of the people working in the game are from the lead dev studioo.
But if you mean internally developed (meaning Sony owned studio as lead dev studio) first party (so published by Sony) games, for 2024 they have announced until now:
- TLOUP2 Remastered
- MLB 24
- HFW (PC port)
- GoT (PC port)
- Destiny 2 The Final Shape
- Concord
If also include 2nd party games, meaning 1st party games (published by Sony) with a lead dev studio not owned by them, then we should add:
- Helldivers 2
- Rise of the Ronin
- Convallaria
- Lost Soul Aside
- Stellar Blade
- Until Dawn (remake)
Then there's the 3rd party exclusives, which aren't first party because aren't published by Sony even if Sony may have bunded or paid them to keep them exclusive:
- Final Fantasy VII Rebirth
- Granblue Fantasy Relink
- Silent Hill 2
- Other AAA/AA 3rd party exclusives I may forget
- PlayStation Indie titles like Pacific Drive or Little Devil Inside
- PlayStation China/India Hero Project titles like Phantom Blade Zero