Hey DaveTheCoder! The Mirror is one app to build & play games - our aim is to be the "platform" for Godot. We provide the hard parts out-of-the-box, such as multiplayer networking, AAA Jolt physics, authentication, databases, servers, and more in one single app. We also added visual scripting and will have in-world GDScript in the future. You can check out our full list of features here.
We updated the above post to add more detail too. We'd love for you to play our Open Alpha on Itch and it'd be great to hear your feedback!