FERPA regulations apply when adding individuals to a course where they can see student information. Make sure you only add people to your course who have “an educational need to know.” You can learn more about FERPA here. Questions about FERPA can be directed to the Registrar.
As an instructor, there are times when you may need or want to share access to a past Canvas site. If you want to share a Canvas site without student data, then you need to request an archive copy of your site. You may prefer to export your course in ePub format if your goal is less about the Canvas experience, request an archive Canvas site and then download a copy your content.