5K2K full resolution not working, only half

I managed to get Monterey to boot on my system, however my Dell U4021QW screen is running at 2560x1080 instead of 5120x2160. I tried putting the resolution in the plist, clicking Scaling in the config dialog while holding Option, and whatever I do there never, ever is 5120x2160 in the list.

Asus Strix Z490-I, i5-10400, iGPU. Followed this guide. Tried to connect the screen via DP and HDMI.

submitted by /u/thehedgefrog
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