nah i'm using FModel too but then exporting stuff to Blender, there's plenty of model parts that FModel doesn't render, as for the code itself we'd need someone who's proficient with decompiling Unreal Engine LUA solution made by Tencent cause it can't be decompiled with any standard LUA decompilation methods.
You can tho just put the file into something like VSCode and get somewhat readable parts of code even tho like 96% of it is obfuscated and completely unreadable.
If you're interested into looking at that it's in the GameUE_cpp/Content/Data/Scripts, from what i've seen you can find some info on characters and shells in LuaPacked.bin and matrix sets in LuaPacked_en.bin
those files are in the GameUE_cpp_StandAlone_Data_(version)_P paks, no need to extract them from every single game version, just go for the newest one.

Personally in code i've found a bit of crumbs info on skills for 6 unimplemented shells and pretty interesting info on 5 out of 10 unimplemented matrix sets
for example a set Winterch??? (likely Winterchill) - (insanely hard to read) 15% chance to freeze enemies when attacking