First PS4 exclusive to pass 20m this gen if I'm not mistaken. Uncharted 4 was at 15m last official update, Horizon at 10m last official update, God of War 10m last official update. Considering Sony never announced 20m for those 3, it's probably safe to assume that Spider-Man beat all 3 of them to 20m.
Sony didn't announce this one as well. It was one employee that put it on his resume. GoW most likely already crossed, TLOU+TLOUR have crossed and UC4 is very likely near it as well.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"
Azzanation: "PS5 wouldn't sold out at launch without scalpers."