QGroundcontrol getting parameter data in any .qml file

I rearranged the QGroundControl application according to my needs. I need to make changes for direct access to some parameters from the Fly View (Flight Screen). For this, I tried using the FactPanelController Class and the GetParameterFact function. However, the relevant parameter value always appears as “0” in the text I created and I cannot change the parameter. Is it not possible to use the getParameterFact function directly in .qml files?