When outlining the risks in your project charter, you can list them as high level items and they do not have to be detailed. In my own projects, I mention these risks to let my sponsors/stakeholders know that I am aware of some visible risks we are likely to encounter.

During the Identify Risk process, you and your team will go in depth and identify more risks that may potentially affect/benefit your projects

I'm a little confused on the difference of evaluating risks for the Project Charter as compared to the Identify Risk process in the Planning process group.