I want to set up the below things in Cloudflare.
https://example.com//
OR https://example.com//
OR https://example.com///
OR onwards
are redirecting to https://example.com/
How can I set up this using the Cloudflare page rule?
It will be quicker to set that in your webserver(Nginx) virtual host than doing it on Cloudflare.
Add below in your Nginx config:
if ($request_uri ~* "\/\/") {
rewrite ^/(.*) https://$host/$1 permanent;
}