Why no 3200x1800 resolution on an M2 MacBook Air on a 5K display?

My preferred resolution is 3200x1800 on a 27" display. For some reason, the new M2 MacBook Air does not offer this resolution, neither on an LG Ultrafine 5K, nor the Apple Studio Display. Using an iMac Pro or a MacBook Pro, with either display, gives the 3200x1800 option. This is true with both Monterey and Ventura. The "Show all resolutions" switch does not help. I called a senior advisor at Apple and he was stumped. Is this a hardware limitation of the Air's GPU? Is there any way to get 3200x1800? MacBook Pro: iMac Pro: MacBook Air: MacBook Air: