Cloudflare pages - domain related problem

I bought a domain on hostinger. I deployed my site on cloudflare pages. However, I have one problem. My domain works fine when I access it without typing “www”. When I enter the domain with “www” the site does not work. How can I make a redirect on for the domain with www so that it directs me to the domain without “www”?
I followed instructions so I changed dns to cloudflare dns