The tweet describes the completion of a training room called 'WAF: Exploitation Techniques' on TryHackMe, which teaches how to bypass Web Application Firewalls (WAFs) using practical evasion techniques. It does not provide a specific payload or detail a particular vendor's WAF bypass. The training likely covers a variety of vulnerabilities and different bypass methods, useful for learning how to evade WAF protections in general.
Check out the original tweet here: https://twitter.com/ToTo13ru_xakep/status/2034584641798070617