Redirect not working for www but working for none www

I have one page rule setup for all incoming traffic for a domain to redirect to a different domains one page url. It works for https://smst.org but not if you try https://www.smst.org Do I need to create a DNS entry A or Cname for www? If so what would the IP or cname be?

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When creating an originless hostname that will only be used for redirection, I like to use a AAAA record set to 100:: because it won’t unintentionally send traffic to a server of you disable the proxy. The name needs to be :orange: proxied in order to reach the redirect rule.