Tired of hitting the sky? No Build Limit raises the overworld's build range from the vanilla -64 to 320 up to the engine maximum, Y -2032 to 2031. That's roughly ten times the vertical space.
Features
Build up to Y 2031, or dig down to Y -2032. Works as a datapack override, so there are no mixins and no config. Lightweight, and should be compatible with most other mods.