First all the game engine have a PC version because HZD and Death Stranding share the same engine. And Days Gone use Unreal engine 4 a multiplatform engine.
Again Death Stranding was a game Kojima productions wanted to do a PC version and it was a condition to sign the deal with Kojima productions. And another fact Days Gone from a critical and sales point of view is a failure on Sony side, this is the reason the game will have no sequel. The life cycle was probably shorter than HZD or Uncharted 4.
Again your argument are made on faith or port begging, they can sold more PS4 port on PC too. My argument comes from numbers and fact. The main source of revenue and profit of Sony is the PSN games and DLC sales and services(including PSNow) after far behind it is first party games sales of new released title like TLOU2 or Ghost of Tsushima last year plus backlog first party game sales and last even further revenue of PC port.
https://www.resetera.com/threads/so...-23b-profits-43-5-yoy-330m-games-sold.416886/
PC port sales are in others with PSVR.
PSN is 69% of Playstation division revenue and probably a bigger part of profit.
If the PSN was as successful on PC than console, Sony would prefer soldthird party games and service on PC because they lose money on console hardware and yt would be much more profitable.