On last look, you couldn't really open existing Xcode projects. The plugin for AppCode and KMP wants to own that, although that will eventually change. If you have specific issues with the Xcode plugin, please share. We are getting back into a refresh of that. I will say, though, I would expect AppCode to eventually be a much more integrated environment. Our thinking on the Xcode plugin is it's mostly a read-only convenience for iOS devs.