If your airplane has code in Javascript, you can enable a toolbar panel this
way:
Coherent.call("TOOLBAR_BUTTON_TOGGLE","YOUR_PANEL_ID",true);
Your panel id is the one matching the panel-id tag in your html file, and
passing false as the 3rd parameter will disable it. If, instead, your airplane
is WASM/C++, you are out of luck, so I suggest to vote my proposal to expose
Coherent calls to WASM: https://devsupport.flightsimulator.com/t/4024 Being
able to dynamically turn off panels when not required was the main reason of
my suggestion.