fgo il2cpp, arm64, unity FGO Waltz — need Il2CppDumper on ARM64 binary

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[HELP] FGO Waltz — need Il2CppDumper run on ARM64 binary (auto-detection fails)

I'm trying to extract 3D models from Fate/Grand Order Waltz (Unity 2018.4.18f1, IL2CPP 24.1). The game shut down in 2020 but I have:

- libil2cpp.so (ARM64, 75 MB)
- global-metadata.dat (7.5 MB)
- 22 cached character bundles (AssetCache _d/_h files, ~83 MB total)

The bundles are encrypted with a custom AthenaAssetBundleProvider. I need Il2CppDumper to find the AES key, but both Il2CppDumper and Cpp2IL fail with "No symbol is detected" / "Failed to find code registration".

I tried on Windows with ARM64 and ARMv7 versions of the binary — same result. Manual Ghidra analysis didn't help because I'm not a reverse engineer.

Can someone run Il2CppDumper on this binary? I just need the dump.cs output — I can take it from there.

Files attached below (libil2cpp.so + global-metadata.dat, 27 MB zip)

fgowaltz_il2cpp.zip