So when a business has decided that they want their app built using Ionic as the ‘Ionic developer’ who is working on the project you are seen as the expert. Not only should you be able to develop an app with Ionic, but you need to be able to guide the business through the process of having building a hybrid app.
I fully agree with Stephen, businesses are looking for an expert. While he applies this to Ionic development, this is what any good freelancer can do.
If you want expert rates, then you need to offer more than just typing code. The most valuable thing you provide is your decision making ability.