Unity v64 Reference Guide
Colocation Package To enable Local Multiplayer the following is needed
Matchmaking - Finding Players to play with
Player Connection - Players joining the same game to play in
Colocation - Players can see the same object in the same position
Colocation Package provides network agnostic interfaces to enable colocation in Mixed Reality using Unity. Colocation Package does this by implementing the core logic of Shared Spatial Anchors.