But this game never released on PS5? And Sony doesn't have the obligation to make a PS5 upgrade for a game that came out and we paid for 6 years ago on a different platform just because they now have better hardware...and all that for free. Expecting these companies to do these free game upgrades and for free is weird.
I get you're saying all that specifically for this game since there's already a PC version...but it's still not like flicking a switch. They'd still need time to work on that PS5 version...and Sony is never investing on that specially for free. Don't forget this game is already on PS Plus Collection...PS Now...it was also given for free (not even attached to their subscription services) through their Play At Home initiative, etc...
Sony is remaking a 2013 AAA game as we speak and will sell it at full price. You're asking for a free upgrade to a game you paid for in 2016. I'd love to get what you're asking for but it's never going to happen.