When I linked my Ubisoft account from my xbox to my Pc I didn't get all the Operators and everything else that I have.
Hey nbrancate, thanks for reaching out and welcome to forums!
As it stands, cross-progression between all platforms is not available for Rainbow Six: Siege is currently not available and therefore you will not be able to access your Xbox content on PC.
To find more information about this, have a look at the following article.
Should you have any further questions, let us know!