Cloudflare Tunneling issue

Like I understood you can host your websites via cloudflare tunneling without port forwarding?
That's what I did but now it's causing me issues for example I can't host it at all. I am hosting my website via ngnix and it runs perfectly locally on that but when I open cloudflare tunnels the website is not working (yeah I bought a domain for my website) I put the correct nameservers and cloudflare said it's setup and everything is ready but I can't access my website without getting that stupid 522 error. Can anyone please help me?
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