Hey @alfazenux ,
Thank you for reaching out and adding a translation, we appreciate it!
Rainbow Six: Extraction support cross-progression across all platforms as long as the same Ubisoft account is being used.
As for achievements though, as each platform uses a different achievement system, I'm afraid it isn't currently possible to sync and automatically unlock achievements across platforms.
If you complete an achievement on PC, you'd need to do the requirements again to unlock it on Xbox.
I hope this clears things up and if you have any further questions, please let us know!