If you’ve ever imported a mesh into Unreal Engine 5 and you noticed parts of it were missing/invisible, then stay tuned. In this tutorial, I explain what Normals are, how to view them in Blender, and how to fix this issue.
https://dev.epicgames.com/community/learning/tutorials/LeM9/unreal-engine-5-how-to-fix-invisible-missing-faces-on-a-model