If your case study does not appear in your portfolio you need to publish it.
Follow these steps to publish a case study in the Portfolio Editor:
Hover over the case study you want to publish
Click Options in the top right corner.
Follow these steps to publish a case study in the Case Study Editor:
Open a case study in edit mode.
Click Publish Case Study on the right side of the navigation bar.
Follow the steps in the Publish Case Study Modal.