Hey guys I found a way to Prioritize frame rate on ps4 pro in 4k Mode
step 1: start your ps4 pro in 1080p and boot GT sport, Once in the game go to Settings and display settings and select Prioritize frame rate,
step 2: host a online lobby race, one in your lobby press your ps button to bring u back to your ps4, now go to Display settings and Put is as 2160-yuv420 the screen we restart and the game will close,
step 3: reboot GT sport you will see in your Display Settings that prioritize frame it will be selected but you can change it,
And if u rerun the Configurator you will see you’re in 4k mode with Prioritize frame rate
and now you can in joy 1800p and almost 60fps replay
ps I wounded if it works on ps5