The default MultiplayerAPI is actually a SceneMultiplayer

[IfgiU]

Your Godot version: v4.2.2.stable.official [15073afe3]

Issue description: In the "High-level multiplayer" overview (Arguably the first link someone stumbles upon when googling "Godot multiplayer") it is said that by default, the multiplayer node already has a MultiplayerAPI configured. However, it's actually a SceneMultiplayer, that inherits MultiplayerAPI. This is actually really important however, because you need to set allow_object_decoding in the SceneMultiplayer to true to send objects over the network, something which probably every Godot multiplayer game does. Each time I made a new multiplayer project I always stumbled over this issue and only then remembered that. Considering how essential that option is, maybe it should also be mentioned in the "high-level multiplayer" overview.

URL to the documentation page: https://docs.godotengine.org/en/stable/tutorials/networking/high_level_multiplayer.html#initializing-the-network