Renowned modder and dataminer Lance MacDonald, who was able to run Bloodborne at 60 FPS on PS4 Pro, tweeted that a number of PS4 titles have already received PS5 support through recent updates. In particular, this is God of War 3 Remastered, God of War (2018) and a remake of Final Fantasy VII.
Lance has already deleted his tweets, but there is a screenshot.
This may well explain the sudden patch for FF7 that came out this week. Among the changes, only “bug fixes” were indicated, but the modder is sure that there is much more there, although we can only find out what exactly at the start of the PS5.
Earlier on the network, there was a rumor that Square Enix is preparing an improved version of the FF7 Remake for PS5.