A best practice in Unreal Engine is to create a Content-Only Plugin in Unreal to collect and share your assets, such as blueprints, editor utility widgets, libraries of materials, or any other content you want to share between projects or manage outside the project itself. This tutorial will teach you how to create a Content-Only Plugin for your project.
https://dev.epicgames.com/community/learning/tutorials/Y5Zm/creating-a-content-only-plugin-in-unreal-engine