Making mods for Android is no more difficult than for PC. All the tools are there, there is not enough knowledge. But people with experience creating modifications ignore android, and could port modifications to them. You just need to start small, as it was on the PC.
UE Explorer can work with both types of files. PC: version 845, licensee version 64, engine version 8917, cooker version 135/011. Android: version 870, licensee version 64, engine version 11841, cooker version 136/011.