Env:

macOS 15.6
Qt GP 1.3
Gradle 8.10

Steps to reproduce:

1. Open example from /Users/apple/Qt/Examples/Qt-6.8.4/platforms/android/qtquickview_java in Android Studio
2. Go to app/build.gradle and set the following as per your settings 

   QtBuild {
       // Relative for Qt (Installer or MaintenanceTool) installations.
       qtPath = file('../../../../../../6.8.4')
       projectPath = file('../../qtquickview')
   } 

1. Sync and build it
2. Now add qtKitDir and specify the kit that is not the default one, e.g. android_arm64_v8a

   QtBuild {
       // Relative for Qt (Installer or MaintenanceTool) installations.
       qtPath = file('../../../../../../6.8.4')
       projectPath = file('../../qtquickview')
       qtKitDir = file('../../../../../../6.8.4/android_arm64_v8a')
   } 

1. Sync and build it 

Error:

CMake Error at /Users/apple/Qt/6.8.4/android_x86/lib/cmake/Qt6Core/Qt6AndroidMacros.cmake:158 (message):
Detected Qt installation does not contain qtforandroid_arm64-v8a.so in the
following dir:/Users/apple/Qt/6.8.4/android_x86/plugins/platforms 

Workaround:
Once you add the qtKitDir, clean the build and rebuild it again. 

Note:

This was reported before as well with qtGP 1.1 QTTA-252