I'm assuming this is the same situation with Three Kingdoms The Last Warlord. I guess if you're really interested in this game it's best to buy it, which I did. Maybe major modders will crack the drm but even then it probably will take time.
If, you only want to edit the .ini files. Soldier stats, weapon, etc. You can find the XComGame folder inside android/data/com.feralinteractive.xcom2_android/files/feral_app_support/VFS/Local/my games/XCOM 2 War of the Chosen/XComGame. Requires root to access the folder, use pc or laptop if you...