SSL Deep Inspection Flow-based mode will not support TLS1.3

We encountered an issue where we needed to enable SSL protection on our internal web server to provide connections for external visitors. After enabling SSL protection, the browser displayed ERR_CONNECTION_RESET. When checking with openssl s_client -connect, we found that TLS1.3 was not supported, but TLS1.2 was supported. We also confirmed that the backend server originally supported TLS1.3, but when we switched the firewall mode to proxy mode, it could support TLS1.3 and the browser could access the website normally.