Rockstar Games released Red Dead Redemption update 1.03 for the PlayStation 4 that added the ability to play at 60 frames per second, but only on PS5.
To clarify, the PlayStation 4 port of the game (which launched alongside the Switch port) was locked at 30 frames per second. Users that play it via backwards compatability on PS5, though, now have the option to toggle 60FPS on in “Display” settings.
Red Dead Redemption has been available on Xbox 360 (and playable on Xbox One via backwards compatibility), PS3, and now Switch and PS4.