I developed a website where I am using Cloudflare 'Under Attack Mode'. When I make a post on Facebook or LinkedIn, etc., the metadata appear just fine. However, they do not appear on WhatsApp. How do I fix this?
Please note that they come up on WhatsApp when the "Under Attack Mode" is turned off.
If Cloudflare is flagging WhatsApp or requests, you can allow the WhatsApp user-agent to bypass challenges by creating a configuration rule. Go to Rules > Overview, then select Create Rule > Configuration Rule. In the new rule, choose "Custom filter expression" under "When incoming requests match...". Use the expression editor to set the condition to starts_with(http.request.headers["user-agent"][0], "WhatsApp/"). Under the "Then" section, set the action to Browser Integrity Check or Under Attack mode, depending on what you need. This should resolve the issue.