Unlike the PlayStation 4 Pro, the PlayStation 5 Pro automatically enables boost mode, also known as game boost. This will allow you to play some PS5 games at a higher resolution and/or better frame rate.
However, you may still need to make some adjustments on games with multiple graphics mode.
In Final Fantasy XVI, for example, the Graphics Mode has a 30 fps cap. While the resolution is boosted, you won’t be able to play beyond the 30 fps limited.
If you change FF15 to Performance Mode, then you will get a resolution and frame rate boost on the PlayStation 5 Pro.
In the Resident Evil 2 and Resident Evil 3 Remakes, the Boost Mode/Game Boost feature of the PS5 Pro will let you run the games at 60 fps at the Resolution graphics mode with Ray-Tracing enabled.
If you have a 120 Hz television with Variable Refresh Rate, then you can also unlock the 60 fps cap in Marvel’s Spider-Man and Marvel’s Spider-Man: Miles Morales. This will let you play at higher frame rates, when compared to the standard PS5, on the PS5 Pro thanks to Boost Mode/Game Boost.
To summarize, Boost Mode/Game Boost is automatically enabled on the PlayStation 5 Pro. Games with dynamic resolution and variable frame rate should benefit, although you may need to change some in-game settings.