xtool [0] came up on here a while ago [1]. I think it still requires you get a big xcode app bundle off a macos machine and drop that into xtool, since there's no other way to get the iOS library header files from Apple. The other parts of xcode just aren't used as far as I know. Other than that caveat, you're running builds in xtool's own environment on whatever platform you choose. You can even do code signing.
Omarchy is even less production ready than racking up laptops.
Plus there's the issue that DHH is a racist twat.
That's one of the reasons to keep it as far as possible from anywhere you need trust (like prod): software, like soylent green, is made of people. And you can't trust people like him.
Omarchy, for what it is, is just a toy project from DHH. As much as I acknowledge the guy's talent, it is not viable for any production grade build