You should know better than anyone in the Cloudflare Community about your own website. If that domain isn’t your website, why are you adding it to your Cloudflare account?
You should not be adding it to your Cloudflare account.
There is not any further assistance that the Community can provide.
We certainly cannot make a determination as the legitimacy of the site. Based on the information shared in the earlier reply by @DarkDeviL, the domain owner needs to resolve the registration status with the domain registrar.