Is it possible to create user interfaces for watchOS programmatically ? i.e. without using the StoryBoard files ?

I am trying to build a watchOS app through CMake (generator used is xcode) and Objective-C. When I added the above(int main as entry point), I get an error saying 'WKApplicationMain' is not found. Am using WatchOS 8.3 sdk. Can you help ?

Also, If the user installs MyServer.app independently, now MyServer can also be launched from Finder. Also, one can use MyServer.app to run as a daemon or agent via launchd. Now when MyServer is launched from Finder, because it is a server program, it will not show an GUI. Which I understand is not what macOS users expect, hence not the right UE. Apart from embedding MyServer into MyApp, is there any other approach I can take and still keep MyServer as an independent application ?

Thanks Quinn. First, before I dig deep, wanted to clarify to be on the same page - Using the terms you have mentioned to be better aligned, assume I want to build 2 'separate' products - MyApp.app - This is my GUI Program MyServer.app - This is my Server Program I would also want to build, deploy and distribute them 'separately'. Is this approach okay ? I mean, instead of having MyServer.app embedded in my GUI program itself (as you proposed).