No Extended Tuning Tab MP 1.3.62

I’m trying to set up a payload release mechanism for a fixed wing, but I can’t seem to figure out why I don’t have an extended tuning tab in my configuration tab.
I’m using a pixhawk with arduplane 3.9.5.

In MP when disconnected go to the “Configuration” tab and using the drop down box labeled " Layout", select “Advanced”, which will show the advanced settings .

It is already set to Advanced, tried switching back to basic and back to advanced, but it still doesn’t work.