It's not even close, the ratio of physical/digital software was pretty much 50% so you can take another 6-7% from that 57% from the digital soft + DLC's etc.
And from the games sold, this is the first vs third party sales:
Safe to assume they also make more money from the 30% of all third party games sold than from their first first party.
And having Nixxes already on your team, you'd just have to hire some external studios like they did with GoW to be able to port everything, i mean, Sony has a lot of games yet to be ported to PC, but on recent ones, they don't make that many games per year, last one they got Returnal and Ratchet, this one Horizon, GT, GoW and maybe some Tlou remake, it's not a crazy number anyways.
And yes i still think that in 2022, to have a huge multiplayer hit you have to be on day 1 on PC, that's the platform for multiplayer games nowadays, but yes i also doubt Sony will do that.