A new software beta is out for PS5 players. It includes:
New Gameplay and Personalization Options
1440p HDMI Video Output
The PS5 beta introduces support for 1440p HDMI video output, enabling players to choose an additional visual setting on compatible PC monitors and TVs.**
If the game you’re playing supports 1440p rendering you can experience native 1440p output on your display.
Or, if you’re playing a game with a higher native resolution like 4K, then you may benefit from improved anti-aliasing through supersampling down to 1440p output.
You can check if your HDMI device is compatible by selecting “Test 1440p Output” under “Screen and Video” options within system settings.Links
https://blog.playstation.com/2022/07/28/ps5-beta-introduces-1440p-support-gamelists-and-more/