Blender 2.9 Alembic simulation to ue4?

How to export blender 2.9 alembic sim to ue4? I followed this tut Cinematic Sci fi blast

However the smoke domain was “just” there and now it looks like a expanding cube ): Can anyone help??? it was not like that in this tut Blender Alembic to ue4

But I trouble following it because it was using 2.7 So any advise guys?