Yes, you can share atlas resources in Unreal Engine 5 (UE5) for reusable assets like weapons and hairstyles. This can be achieved by exporting separate atlases for each type of asset (e.g., weapons, hairstyles) and then using these atlases across different characters. At runtime, you can switch between these atlases as needed. This approach allows you to manage and reuse assets efficiently across multiple characters without having to duplicate resources.