Did you consider the hob is actually an integral part of the whole cooker?
This drawing will show you the component parts. Most are easily accessed with the cooker pulled out , removed from its normal position.
This is fraught with safety issues like gas joints and flues.
With all due respect, and I’m the first for diy, some things are best left to a qualified caravan gas engineer.
You sleep in a small confined box and any gas leaks or Carbon Monoxide will,kill you before you wake up.
Alarmist? Yes but it is your call and at least you know the potential dangers,
Hope you get it sorted.