Is it possible to use only one Cloudflare Tunnel hostname for a reverse proxy like Nginx?

I am in the process of configuring an Nginx proxy and opening it to the internet through the use of Cloudflare Tunnel. My inquiry pertains to the feasibility of establishing a single public hostname, and utilizing it as a CNAME record for any domain that is included in the Nginx configuration. I’ve tried this and it just shows up a blank page.

Is there any way to actually do this or is it impossible?

Thank you,

You could set cloudflared to localhost and the respective nginx port, no need to configure a hostname on nginx.