No iOS targets in iOS project files

I’m trying to generate the XCode project files for the UnrealMatch3 sample. As far as I can tell this command should work:

cd /Users/Shared/Epic\ Games/UE_4.xx
./Engine/Build/BatchFiles/Mac/GenerateProjectFiles.sh \
    -project=/path/to/UnrealMatch3/UnrealMatch3.uproject -Game -Platforms=ios

This produces UnrealMatch3_IOS.xcworkspace in the project directory and both engine and game project files in Intermediate\ProjectFilesIOS.

However, these project files only include Mac targets - there are no iOS targets.

This is surely a bug? XCode version is 12.3, macOS version is 10.15.6, Unreal versions I’ve tried are 4.25 and 4.26.