For the RTX 40 series.I remember reading some of the recent AGESAs were a bit...wobbly. I see Asrock have updated the BIOS a few times now since 4.6, so if possible maybe worth trying the later revisions, as its quite possible they've removed some quirks since that initial W11 support BIOS, I note one of them specifically mentions improved GPU compatibility for example.
Today I'm getting insane screen flickering with Windows 11(known issue) but only with two things on the same screen. I have Warframe in the background while reading forums waiting for my sausage rolls in the airfryer and the flickering is the large red bands across the screen. I moved Chrome to my second monitor and it stopped.