I cannot get this to work in 5.4 - tried exporting from blender as stated - and it no worky. Saaaad :'(

I cant remember the error that comes up in Unreal Engine but something about bones or rigged. I'll edit this later once I'm home

If you could post the error message, that would be great. I don’t remember if I ever tried importing it into Unreal with the rig. The rig was made using Blender’s rigify addon, which is probably not compatible with Unreal out of the box.

When I tried preparing it for use in VR Chat, I used Mixamo to generate the rig. That may still be doable if you export just the model to whatever format you need.