You should see the challenged/blocked firewall events in the firewall events if you navigate to the Cloudflare dashboard → Security → Overview and lookup for Firewall events for the past 24hours or so. Once you find them, click on a particular one to find more details about it (user-agent, IP, HTTP version …).
Could you share some details which service was triggered that blocked you?
Really appreciate your replay the server team setup the OWASP 10 rules which have impacted my php application upload functionality and for every HTTP request which is upload script in php has been blocked by OWASAP rules the details are as below