Works fine, monitor is just buggy af as youll discover in other scenarios. The faq has some hints and video of it working fine at 240hz. 240hz is actually easier to get working than 120hz in most setups, too, except macs dont properly ha dle dsc and 240hz with thst display. M1 macs anyway.
Pick up some 6.56f fibbr fiber optic dp cables and thatll likely resolve it.