If you are trying to package your Android game with Unreal Engine 5.7 Preview, you’ll need to correctly set up the SDK, NDK, and JDK on your system. In this video, I’ll walk you through the complete installation and configuration process step by step, making it easier for you to start building and testing mobile games directly on your Android device.
https://dev.epicgames.com/community/learning/tutorials/ppzb/unreal-engine-5-7-0-preview-sdk-ndk-jdk-setup-sdk-ndk-jdk-setup-download-android-5-7-unreal-engine