Tutorials for C# Multiplayer with Hole-Punching (for Recent Tutorials)

Goal: Tutorial(s) for C# Multiplayer, including Hole-Punching (if Applicable)

To whom this may concern,

I am interested in creating a multiplayer C# game, aiming mainly for phones (iPhone, Android etc.) but also desktops (Mac, Windows) too and hosting a dedicated multiplayer server on AWS.

I am having trouble finding a recent tutorial for multiplayer C# for Godot. I vaguely remember something about also needing tutorial information for hole-punching info too, but I’m not sure if that applies because I’m not sure what hole-punching is, or if that applies to the technical setup I described above.

Where can I find those recent resources?

Thank you!

Note: If applicable: I have a Mac, and an iPhone and know how to run an ec2 server instance in AWS.