For as long as the Apple Watch has existed, developers have been asking Apple to let them make their own custom watch faces, a feature that customers would likely enjoy as well. Now in the third generation of the Apple Watch, developers are still not unable to do so. That may change, however, in a future version of watchOS.
Apple May Finally Allow Third-Party Watch Faces On Apple Watch
Maybe soon you’ll be able to choose from watch faces made by third parties on your Apple Watch. The latest watchOS beta has the code for it, though there’s no guarantee Apple will go through with it.