I'm using this: https://github.com/V-Sekai/unidot_importer

in combination with this:https://github.com/barcoderdev/FBX2glTF

to export my whole game as a unity package and convert into a godot project. Exporting from unity took quite some time and I started the import a few hours ago and it's still working. I'll let you know results when I'm done