Also, look in the quick panel and find "secure folder". Make sure it's turned on. If you don't see it, swipe to last page and tap "+". Then look for "secure folder" in 'Available buttons'.
Thank you for reaching out and welcome to the community. I can certainly your concern with not being able to locate the secure folder and I would be happy to look into this further for you. You keep everything on your phone, including private information. With Secure Folder, you can hide your personal data using a special passcode. That way, no one will see anything you don't want them to see. Give this link a try for steps to set up your secure folder: https://www.samsung.com/us/support/answer/ANS00081123/
Please feel free to reach out for further assistance if you are still unable to locate the secure folder on your device.