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Hello, and welcome to Apple Support Communities

From your post we can see you've been using If you can't pair an Apple Watch with your iPhone, and are getting an error message on your Apple Watch. This is a great article to use when you're not able to pair your Apple Watch with your iPhone.

You've shared a couple of screenshots showing an error message showing your Apple Watch is looking for a third-party app. For this you'd want to reach out to the App Store and then if needed contact their developer: How to contact an app developer. Since this is a third-party product, it would be best to reach out to them for product support as they would have help to understand why you might be receiving this error message on your Apple Watch.

We hope this helped.