Hello Dana,
Thanks for using the Apple Support Communities. It sounds as though you are experiencing issues with Face ID set up on your iPhone X. This is a great feature not only for security but convenience as well. We're happy to look into this issue with you.
To make sure we've understood all the steps you've taken, you have been following the suggestions outlined in article, If Face ID isn't working on your iPhone or iPad Prod, right? When you tried the actions outlined here, did you happen to check and confirm that your iPhone wasn't in Silent Mode? If not, would you mind checking and if so, give these steps another try?
If you continue to experience issues, it would be best to contact our AppleCare Support team for additional assistance. You can reach out to them directly at Get Support.
Best wishes.