[flohofwoe]

Zig should be able to do it (the Zig toolchain can also be used to build regular C/C++/ObjC projects, not just Zig). But I think there's still work to be done to be able to build complete applications which could be uploaded to the Store. You also need a separate iOS SDK because this isn't bundled with Zig:

https://github.com/kubkon/zig-ios-example

For debugging you'd still need a Mac and iOS device though, so for the regular development workflow using a Mac still makes sense. But for CI builds being able to build on Linux is pretty big deal.