When do you add Fbx Vertex Animation Data Import Support in UE?

Hi, i’m sathish
Need to add support for importing fbx vertex animated file format! When I import a simulated alembic cloth(in Unreal Engine), the file size is very high. So I export the alembic to fbx vertex data by reducing the file size to 90% (from a blender), but … fbx vertex animation file is not supported in Unreal Engine.
-sorry for my English and thank you