Screen Resolution - stuck with it being 2880*1800 for a 47inch unknown display

Hello - was using this as a little idea after finding a 2.2 Quad-Core i7 in a cupboard at work. Got Monterrey running on it fine but then, through not paying attention or being familiar with macOS ended up right into Sequoia 15.1. At this point it the screen resolution got things wrong and the text is very small. It says the Graphics is Display 20MB. Can someone point me in the direction of how to fix this. Otherwise its running really well.

When I click on Show all resolutions there are no additional options to change this. Color profile is Unknown Display. The desktop cant show any Wallpaper.

Thanks

submitted by /u/scottishdiem2020
[link] [comments]