I installed League of Legends: Wild Rift on my phone and extracted the game's files onto my computer. I assumed it would be easy to extract the assets from the game because it was a Unity game, however all of the files are unknown to the Unity Asset Studio. They're all stored as .bytes or .vfs files. The sound, however, is stored as .bnk files, so those are easy to read.
I don't really know anything about this kind of stuff, so I made a post here to find out more.
You can find the game's .apk and .obb files via this post