Can you bring Custom Maya attributes from a facial rig into UE4?

I have a facial rig that has a bunch of custom Maya Attributes on it which drive the translation and rotation of the joints to form different facial expressions via Set Driven Key.
Is it possible at all to import this into UE4 and set it up in a similar way?

You can attempt to export and import them as curves.
No idea how Maya does it, but it should since it’s the native app for FBX exports.