You can use AI assisted coding in Godot though with addons and an MCP server. That's completely separate from AI pr's in the engine itself.

Also, slight tangent but I'm just going to point out that the new MCP server in Unreal Engine 5.8 totally sucks, so it's not like other engines are that far ahead there. The very first task I gave it was to cache a couple of values in a map, and it couldn't do it because it couldn't figure out how to set the key type to FName (basic stuff). But honestly, I'm not surprised, the surface area of Unreal Engine is HUGE and trying to explain it all to a general purpose agent through tool calls is going to hit limits.