This tutorial covers a way to import curves or splines from blender into unreal engine , but by use of a plugin.
Natively, you can not import curves or splines from blender into unreal engine except by writing your own scripts or by use of a plugin.
Sometime you have a scene that has splines that you would like to carry over into unreal engine from blender and you’d rather not recreate them by hand.
Supports both UE4 and UE5
https://dev.epicgames.com/community/learning/tutorials/xrvb/import-blender-curves-splines-into-unreal-engine