I was wondering how Fusion worked, for example PUN I installed on unity asset store the PUN package, but there is no fusion package? Thank you for your help.
The Fusion package download is currently in our doc pages (as we iterate fast and automated this).
The Tanknarok Multiplayer Demo is the first Fusion package in the Asset Store.
As you mention PUN, I would recommend reading the doc page Coming from PUN and the other pages (there is not a ton of manuals just yet but the ones which are there, will be very helpful to get you started).