Already in use but not visible in Domains plz help me

Hello,
My root domain (fitpass-13.com) is not visible in my project’s Domains list, but when I try to add it again, Vercel says “You are already using this domain on this project.”
I need to either remove or reset this domain so I can re-add it and configure DNS properly.
Please help me resolve this issue.
Thank you!

Any update? I still need help with this issue."

The domain troubleshooting guide can help with most custom domain configuration issues. You might be able to use that guide to solve it before a human is available to help you. Then you can come back here and share the answer for bonus points.

You can also use v0 to narrow down the possibilities.