Every app on an android profile has a unique UID, e.g., com.example.app on user 0 has UID 10123 on the owner profile
This UID is unique to the same app on a different profile, but it is just the user ID + the same UID, for example, com.example.app's UID on user 15 would be 1510123
This can cause unwanted correlation across profiles, like other cross-profiles unique info such as Widevine Device ID, app update timestamps, etc.