Well, its PS4 version got an update to run unlocked in PS5 but never got a PS5 SKU.
A PS5 SKU would shorten loading times to almost nothing, would add DualSense support, 3D audio, even better FPS and resolution even including a PS5 Pro patch to go beyond, etc. Unless they add further improvements as would be improved lighting, RT, textures etc if I was Sony I wouldn't call it Remastered, I'd just use the same name as they did with Until Dawn and would just market it as the PS5 SKU of the game.
I assume they are prioritizing the most recent stuff with bigger sales/upcoming movies and tv shows.
Once they will be done with them they might move to less selling and older IPs as we're starting to see in adaptations of Gravity Rush or Patapon, which I assume will receive a remastered collection somewhere near the release of the adaptation.
I mean, after the current batch of adaptations they may also do Killzone/Syphon Filter/Motorstorm/Wipeout etc. adaptations, which could be released with their own remasters or remakes. Or who knows, maybe a new entry because these games may be too outdated for remasters and potential sales could be too low.