I can't found Internet kill switch option in AX1800

Hello everyone, unfortunately I can't find the option 'Internet kill switch', can someone please help me here? or was this configured differently so I only bought the router yesterday

The "internet kill switch" is always active. As soon as the VPN stops (by crash or provider - not by disabling it!), all traffic routed by VPN will stop as well. For additional security you can enable "Block Non-VPN Traffic" as well: VPN Dashboard - GL.iNet Router Docs 4

It is here.