If you select the Right Pupil group, does it have the Right Pupil handle tag and Right Pupil Size layer tag applied? Also, if you select the Right Eyeball layer, does it have the Right Pupil Range layer tag applied? (similar for the Left-side versions of those.)
Also, in the Eye Gaze behavior, is the Camera Strength set to 100%?
If those seem to be set properly, feel free to share a .puppet file of your character with us to diagnose. Just select the puppet in the Project panel, choose File > Export > Puppet to save the .puppet file somewhere, then post (or direct message) a shared link to the file via Dropbox, Google Drive, etc.