This app was mentioned in 9 comments, with an average of 3.22 upvotes
You need to use the Ubisoft Connect App to search for and add friends. Once you've added them in the app they will show up on your in game friends list. Here is a link to the Android app. https://play.google.com/store/apps/details?id=com.ubisoft.uplay
https://play.google.com/store/apps/details?id=com.ubisoft.uplay for me. There's a console app of this as well. I just use this because it's easier. I'm going to assume they have it for PS4 console as well. I don't know, I'm on Xbox. =/
>So there's a Ubisoft app I can get on my phone to claim those rewards?
Apparently LOL (I have PC so I just use the App on PC or the Web Browser.
https://play.google.com/store/apps/details?id=com.ubisoft.uplay&hl=en_US&gl=US
No. Massiv/Ubisoft does not (unfortunately) provide such a function/Api. All you can look up are general statistics which you can also see in the UPlay app.
UPlay App (Android): https://play.google.com/store/apps/details?id=com.ubisoft.uplay&hl=de
UPlay App (Apple): https://apps.apple.com/de/app/ubisoft-club/id405228226
Division 2 Stats, Lederboard: https://tracker.gg/division-2
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https://play.google.com/store/apps/details?id=com.ubisoft.uplay