Maybe consider https://github.com/Planimeter/game-engine-2d? We have multiplayer with client-side prediction out of the box. Example code is included to demonstrate the ease of networking entity fields, and there is an included payload abstraction for creating networked events.

You can set the tick rate for your game based on your needs as well. And prediction is robust, supporting exceptional packet loss and smoothing over latency concerns for player movement.

Even Godot doesn't support multiplayer networking out of the box: you have to write it yourself.