Unreal Engine Marketplace Seller Guide.
Becoming an Unreal Engine Marketplace Seller.
The Unreal Engine Marketplace is the e-commerce platform through which content creators using Unreal Engine connect with developers by providing a wealth of game-ready content and code.
You can sign up to become a publisher and submit your Unreal Engine products using the Publisher Portal, and if approved, you’ll receive 88% of the base price for every sale of your published products.
https://cg-school.org/blog/sell-on-epic-marketplace-for-beginners-lets-make-money/ - all additional links and step by step instructions.
https://dev.epicgames.com/community/learning/tutorials/xrX1/unreal-engine-sell-on-epic-marketplace-for-beginners