I have an app on the App Store and I have to create another app. This other app has some of the same functionalities as the first app. So I wanted to create a framework to put the common code in and use it inside the apps. Unfortunately, this framework has to change to add more features and improvements.
I saw that dynamic libraries can update the library code without any change to an app already pushed to the App Store. But this is reserved for Apple. Also, since iOS 8, we can create a dynamic framework which includes dynamic libraries. So is it possible to have the same, meaning if I update my dynamic framework, it also updates the app without having to push to the App Store again and face app review process?
If not, do you have some clues/recommendation to achieve that?
Dynamic Framework is a bit different from the understanding you have. Please read apple documents in more detail for that.
Currently only way to achieve what you expect is to push code on App Store as hidden, and based on some server API configuration update your content accordingly (Firebase Remote Config is one such good example if security is not that big a concern)