You can receive shared watch faces sent to you in Messages or Mail, or by clicking a link online.
Open a text, email, or link that contains a shared watch face.
Tap the shared watch face, then tap Add.
If you receive a watch face with a complication in a third-party app, tap the price of the app or Get to download the app from the App Store. You can also tap Continue Without This App to get the watch face without the third-party complication.
You might find a shared watch face link while using your iPad or Mac. In this case, you can tap or click the link to download the watch face file. Then use AirDrop or the Files app to send the file to your iPhone. Tap the file on your iPhone and choose to open it in the Apple Watch app, then tap Add to My Faces.