Hey! I’m fighting with the same issue and was wondering which .plist file did you edit.
I am launching Unreal Editor (4.27.1) via Epic Game Launcher and have updated both Launcher’s and UE4Editor Info.plist files with
<key>NSMicrophoneUsageDescription</key>
<string>Record Audio</string>
but have not managed to get Unreal Editor into the list of apps with access to the microphone.
Am I missing something else?
SE