Hello SuperSearle, thank you for your post.
The cross progression features for Xbox and PlayStation consoles are planned for 2022. This features will allow you to use the same inventory (skins renown), progress, and Player Stats across these platforms
Please note you must make sure your Xbox and PlayStation accounts are linked to the same Ubisoft account. You can do this via your Ubisoft account management website, here -
https://account.ubisoft.com/en-GB/account-information
If you would like to read more on these features including cross play, please see our dedicated support article here -
https://www.ubisoft.com/help?article=000097631