Link for reference: https://github.com/joshuaswarren/omarchy-apple-dev

It has been used to build and and submit an app on a Linux machine, according to: https://x.com/JoshuaSWarren/status/2109068298537066710

This directly challenges the author's claim "You can't build iOS apps without a Mac."

omarchy-apple-dev is built on: https://xtool.sh which is "a cross-platform (Linux/WSL/macOS) tool that replicates Xcode functionality with open standards."

There's also: https://github.com/MarcoDotIO/Ycode - which even includes an experimental simulator.

That stack is based on xtool at its core (xtool.io). It's very cool, but still early for steady enterprise use IMO.

Also it doesn't have iOS Simulator, so automated testing is out of question. I doubt that porting the Simulator would be feasible, since it requires macOS kernel.

Well, maybe with XNU in a VM and reimplementing parts of macOS userland. Would love to see someone try.