Is it possible to create custom resolutions with DSC?

[99muppets]

I can get the new LG 27GX790A-B (480hz 27' 1440p oled) for $1150 AUD ($720 USD), however, I will want to use the 24 inch mode. But for whatever reason, LG has decided to NOT go the asus route and add a pixel perfect resolution and just downscale native 1440p which apparently is blurry, so ideally i'd pick no scaling, and use a random resolution that is 16:9 and approximately 24 inches big, but I keep reading it's impossible to create custom resolutions with DSC monitors. Is there REALLY no way around this? The next cheapest monitor at these specs is $1800 AUD. Cheers