Ionic doesn’t have native support for building applications specifically for Apple Watch.
From what I’ve seen, WatchOS apps usually need to be built with Swift or Objective-C using Xcode and WatchKit. Ionic’s awesome for mobile apps, but it doesn’t really work for Apple Watch stuff. You’d probably have to start a new project in Xcode for the watch and then connect it to your Ionic app if that’s what you’re after. Honestly, this reminds me of when I ditched the smartwatch headaches and went for something classic like a patek philippe replica—way simpler, and it still looks amazing.