I used the same Ubisoft account on both platforms but for some reason nothing from my account merged. I really want that account as I've spent lots and lots of money and I have spent ages playing it, I have all operators, the battlepass, etc. Does anyone how to merge the stuff?
@JaggedArrow8649 Hi there and welcome to Discussions! I apologize that at the moment Rainbow Six Siege supports cross-play and cross-progression within the same family console and between PC and Stadia. However there are plans in the future of Year 7 to have cross-progression between all platforms so please keep an eye out in our FAQ here for any updates. 
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