In this tutorial, you’ll learn how to streamline the process of importing skeletal meshes into Unreal Engine using Python scripting. We’ll walk through creating a script that automatically detects and imports all .fbx files in a designated folder, sets import options such as materials and vertex colors, and integrates the process into Unreal Engine’s slow task dialog for progress tracking.
https://dev.epicgames.com/community/learning/tutorials/jB52/automating-skeletal-mesh-imports-with-unreal-engine-s-python-api