ReadPlayerMe is an avatar system that can be easily implemented in different platforms. I had experience using it for web-based experiences, and today I found just how easy it is to implement in a Unity project as well.
No only did I implement functionality for loading avatars and using web view to create new ones, I also made a build and tested it on my Iphone.
Super easy and super powerful! Open, integrated, cross platform. That's how you build for the Metaverse.