For the MS Store version, I believe that the original files (e.g., “Keyboard 2024 Transversal”) are protected and not readable, unlike the Steam version.
What you can do is duplicate these original files (e.g., “Copy Keyboard 2024 Transversal”). They will then be readable in XML format in the custom files directory.
Custom files directories:
MS Store 2024:
C:\Users\[User name]\AppData\Local\Packages\Microsoft.Limitless_8wekyb3d8bbwe\SystemAppData\wgs
MS Store 2020:
C:\Users\[User name]\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\SystemAppData\wgs
Steam 2024:
C:\Program Files (x86)\Steam\userdata\[STEAM_USER_ID]\2537590\remote
Steam 2020:
C:\Program Files (x86)\Steam\userdata\[STEAM_USER_ID]\1250410\remote
An application available on FlightSim.to makes it easy to read these files and view the command mapping.
https://fr.flightsim.to/file/96191/afficheurprofilsfs24