Ionic iOS app doesnt add all cordova plugins

In my app, I have added a number of plugins via cordova and when i build my iOS app, and open it in xcode, it doesnt add all the plugins even though it shows that all plugins have been added on the project ios /projectname/plugins folder but on xcode most of them are not added.

Does anyone know why this is happening??

Please define:

and open it in xcode, it doesnt add all the plugins

What are you expecting to happens? What actually happens?