I’m also currently looking into this for export to UE4 engine. I’ve found Ossim so far that could be worth a try: Ossim - Bake simulations to armature (UE4, Unity) - Now with Blender 2.8 support!
But I haven’t tried it myself yet, so I can’t say if it really works. I guess you’d have to convert the FM sim to keyframed single objects first for it to work correctly. If you happen to try it out, some feedback would be nice.