Netcode for Entities
Netcode for Entities is a networking framework built on top of Unity’s Entity Component System (ECS) that allows you to create multiplayer games with server authoritative architecture and client prediction.
Refer to the Unity Netcode Samples for introductory step-by-step samples, material, and some more advanced demos.

Requirements
As of Unity 6.5, Netcode for Entities is a core package included in the Unity Editor by default, along with its dependencies Unity Transport and Unity Entities.
Always looking for your feedback and providing support
The Netcode for Entities team is always looking for feedback, suggestions, and improvements. To give feedback on this package or get support, please post to in the Netcode for Entities Discussions forum using the netcode-for-entities tag.
Note
Netcode for Entities specific bugs should always be reported via the Editor (Help > Report a Bug...), and please link to related threads (and the bug incident number, if available), especially if cross-posting the same issue to both.