The co-op mode in Halo Infinite won’t have online matchmaking.
Players of the recent beta noticed matchmaking wasn’t available, but Xbox has confirmed to GamesRadar the feature won’t be in the final release.
“Online matchmaking will not be available with final co-op,” said an Xbox representative. “We encourage you to continue to use the Halo LFG and the new Discord voice call feature on Xbox to find players to party up with as you continue playing the beta.”