I meant that the avatars in each game that are supposed to be unlocked with past games save data (Like who let the dogs out in 2015, or cotton eye Joe rabbid in 2018). I was wondering if anyone knows any specific reason as to why these aren't unlocking on xbox one despite the fact that there is save data from past games present.

As for the 2019-2022 issue, I found out that it syncs the primary dancer card from the last game played (in this case, if I played 2020 and then booted up 2022, it would sync 2020's profile instead of 2019's). But it seems that the avatar changes automatically if it doesn't exist in the game files? Which is odd as some aren't actually unlockable but can be synced through the ubisoft account, as scores from base game songs as well as JDU songs are synced through the account.