The repacker can strip out unused architecture (like keeping only arm64-v8a ) to make the final APK smaller than the original XAPK.
APK files are the package files used by the Android operating system for distributing and installing application software. Essentially, an APK file is an archive file with a .apk extension, which contains all the necessary files for an Android app to be installed on a device. online convert xapk to apk repack