Hey @tjktjktjk! So currently there is cross-play, but you are not able to invite users from PC and vice versa. Stadia and Ubisoft are aware of the issue and working towards a fix from what this tweet...
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Hey @tjktjktjk! So currently there is cross-play, but you are not able to invite users from PC and vice versa. Stadia and Ubisoft are aware of the issue and working towards a fix from what this tweet says below. You can also check out this link with some info about the issue - Rainbow Six Siege crossplay issue on Stadia confirmed, fix in the works (piunikaweb.com)