@MobileTen What do you mean by reputable scientific sources?

Firstly, thanks for your response. The bundle id of the ios application is added in the applestore, but a bundle id with .watchbookp extension is not added. When I try to add manually, I get an error like this :

I am getting error from App Store Connect when trying to create AppID as com.servislet.ServisletV2.watchkitapp. When I try to install without creating an AppID, Xcode gives an error: Failed to register bundle identifier.