some other weird things i've encoutered with this monitor .... it works pretty well with games that have in-game HDR settings like RE4 Remake and TLOU 2 Remastrede and it looks perfect , but doesn't work well in games that uses PS5 HDR calibration , RE 4 looks incredible with HDR..
this issue also remains in Asus OLED monitors they won't let user to change the visual gaming modes or the color modes like LG C2 , once you enable HDR all setting will be locked .
people should avoid this highly overpriced piece of crap monitor and save the trouble , maybe it gets betterwith a new firmware in the future but i doubt that asus literally doesn't give damn
Also the link above you mentioned is 400HDR monitor this is 1000 HDR with 90% DCI-P3 color gamut