Well, I was talking about consoles. PC is different, because it also includes other markets like their own exclusives like all these F2P Asian stuff, browser games, extra small indies and so on resulting in a bigger 3rd party suppport.
Regarding consoles, Sony has locked these Japanese big games (smaller/portables ones are also on Switch or only on Switch). Stuff like Final Fantasy XVI, FF VIIR Ep 2, Project Athia, Guilty Gear Strive, Babylon's Fall and so on. For Asia, even multis who are also released on Xbox sometimes are only released on PS there because of the insane market share difference they have there.
But Asia is the biggest gaming market because of F2P on PC and mostly mobile, the console market is migrating to mobile there. Regarding console games, the biggest markets are NA and EU so even Japanese console companies focus primarly there, and the western console companies obviously too.
Sony has a bigger western market share than MS -with way less difference than in Asia- so in that big console western market they also get more support from the worldwide companies who target the western markets.
Right now, I think the main weapon Sony has over MS is the market share, and I think the main reason of that are the exclusives, specially because most of them aren't available on PC unlike the MS ones. I mean, both exclusive and multis are important for Sony and there are no hints leading to think that they may lose them in the next few years. In fact the opposite, we've seen these years historical record sales for both soft exclusives and overall software PS4 sales which means we'll see more of both.