Contact - TUBE FLARING TUBE FLARE ORFS FLARE 37 FLARE 45 FLARE

Play backward compatible games with friends\n\n To party chat with friends who are also playing on next-gen consoles, press the Xbox button , and then select Multiplayer > Start a party. This works for anyone on Xbox, whether they're playing games made for Xbox Series X|S, Xbox One, Xbox 360, or original Xbox.

yes all call of dutys are backwards compatible for xbox one.