A quick look at some options for multiplayer in Unity : r/Unity3D
RELEASED] Standard RP Mirror Shaders - Unity Forum
how to make a real mirror in Unity? - Unity Answers
Mirror Reflection for Unity - YouTube
Mirror Objects | Package Manager UI website
AR VR Unity on Twitter: "Re-writing Mirror Shaders for >= Unity 2020.2 this time runs with shader graph and supports custom shaders too. So you can use mirror textures on your own
Unity VR : Mirror – Fist Full of Shrimp
Mirror Quick Start Project - Mirror
Mirroring object with scale gives wrong rotation - Unity Forum
Is it possible to make an Inifinty Cube (2-way mirror material) & question on lighting verticies - Unity Forum
Mirror Objects | Package Manager UI website
Mirror reflection not working as planned - Unity Answers
Unity Tutorial - Making a Multiplayer Game
Magic Mirror - how to modify reflection? - Unity Answers
How to Add Mirrors in Unity (Very Easy) - YouTube
2 Ways to make a mirror in Unity - YouTube
Magic Mirror Lite - Reflection for Unity | Particles/Effects | Unity Asset Store
How to make a mirror in Unity - VionixStudio
Unity Multiplayer Using Mirror (with Rigidbodies) - WireWhiz
Magic Mirror Lite - Reflection for Unity | Particles/Effects | Unity Asset Store
Covert or make multiplayer game or script with unity and mirror by Sam_hype | Fiverr