Err not sure about the fuel switch but there's one to hide the throttle, prop and mixture levers as well..Baron topic but pretty sure its the same for Bonny?
https://community.justflight.com/topic/9411/feature-request-ability-to-hide-throttle-prop-mixture-levers?_=1762800571605
P122 of the Bonny manual, it is tucked away a bit..
For a complete understanding of the unit’s functionality, please see the “More Information on Operation” section of this manual for training videos and operating manuals. The EDM-800 has two push buttons that provide all control of the unit; however, several functions require pressing both buttons at once. This is accomplished in MSFS via an invisible button at the bottom of the unit’s bezel, between both buttons. The single engine EDM-800 is very similar in appearance and operation to the twin engine EDM-760, which is featured in the Baron Professional.