The tweet mentions AFB (Advanced Filter Bypass) as a tool designed to automatically trigger in a WAF scenario. It claims to use a universal bypass that is impossible for a WAF to block and makes use of special payloads to achieve its goal. The vendor of AFB is not specified. It appears to be a tool for bypassing WAF restrictions. More technical details are needed for further analysis.
Check out the original tweet here: https://twitter.com/KN0X55/status/1776178448945316248