Add custom full screen resolution to Minecraft

In the Minecraft Java launcher we already have the option to change the window resolution, but not the full screen resolution, for full screen we can only choose between a few resolutions in game, but It would be better If we could customize the in game full screen resolution by the launcher like we have for window size resolution, I prefer on the launcher because sometimes I use modpacks on older versions and to have better performance I need to reduce the resolution, for me there is a big difference between 1080p and 900p(1080p looks fine but 900p looks really bad), so it would be really nice if I could use something like 990p, or at lower resolutions if we could use something like 480p or 540p, maybe even lower like 360p.