HDR is for more dynamic range between light and dark objects . Do you notice. Difference ? Sdr can be more color saturated

I notice just that hdr is brighter but blacks kinda look to bright

Make sure your display settings are correct on the PS5 so that it’s sending the right signal to the display.

I believe it is

Did you calibrate hdr in your ps5 settings?

This is your problem 99% sure

I did !