In addition to cross play, Rainbow Six Siege is also getting cross-progression. This means you'll be able to use the same inventory and carry your progress over to another platform free of charge. All you'll need to do is link the same Ubisoft account to the relevant platforms you want to play on.

Will Rainbow Six Siege have cross platform?

Rainbow Six: Siege currently supports cross-play and cross-progression between different consoles in the same family, and between PC and Stadia. This means you can move your progress between either your PC and Stadia account, your PlayStation 4 and PlayStation 5, or your Xbox One and Xbox Series X|S.

Is Rainbow Six Siege Crossplay between Xbox and PS4?

Is Rainbow Six Siege cross-platform PS4, PS5, and Xbox? Yes, if you have a PS4 or PS5, you can play with your friends who are on the other system (Xbox). The game will be cross-platform, meaning if one had a PS4/PS5 and someone else has an Xbox they could play together in multiplayer.