Before you can install a downloaded APK, you must allow your device to install apps from outside the Play Store.
(released late 2023)
Newer versions of Play Services are designed for Android 12+ and will not install on KitKat. Android 4.4.4 Google Play Services Apk
But then the notifications began.
To fix this, you need the specific designed for KitKat. Before you can install a downloaded APK, you