Jenkins add agent Issue

When I was using Jenkins version 2.456, there was no option for Tunnel connection location when adding agent nodes in the node configuration. However, this option was available in earlier versions 2.39 and earlier. May I ask what is the reason for this.

Tt can’t be configured anymore via UI as the UI setting has no effect. But the tunnel option still exists and you can pass it when you start your agent from commandline or script.