I dont know if this is what you mean (as im new to linux) but Fedora only allows 100% and 200% and nothing inbetween without extra configuration changes
The way it works on macOS is that you select the ‘looks like’ resolution to determine the size. For example if you have a 4k monitor you can set a ‘looks like’ resolution of 2560x1440. Internally it always renders at 2x, so in this case it will render to 5120x2880. That image is then scaled down to the actual display resolution, e.g. 3480x2160. It’s basically supersampling.