One of the most common needs when developing for mobile platforms is making sure the download size of the game and the storage size of the game on the mobile device. Unreal Engine 5 can be tuned to reduce the build size significantly. This article lists some procedures one can implement to reduce the game size.
https://dev.epicgames.com/community/learning/knowledge-base/Kp0x/unreal-engine-optimizing-build-size-for-android-mobile