https://actorcore.reallusion.com/auto-rig
AccuRIG is a free application designed for fast and easy character rigging, aiming to reduce production effort for character artists by focusing on model design with automation and simplicity. Achieve accurate and superior rigging results in 5 simple steps for models in A/T/scan poses, or with low/high/multiple meshes. Direct export to all major 3D tools, or upload directly to ActorCore and try tons of production-ready animations for game, film, archviz, digital twins and more.
The models rigged with AccuRIG can be exported to animation-ready formats including; FBX, USD and iAvatar. These formats are compatible with Unreal Engine, Unity, Blender, iClone, Omniverse, Maya, 3ds Max, MotionBuilder, Cinema 4D, and any other 3D tools.
haven't tried it yet, but it looks very promising according to some yt reviews and i believe the integration with other reallusion productions should be on point.