https://www.gamespot.com/articles/rainbow-six-siege-chimera-issues-missing-outbreak-/1100-6457189/

Update 3: Another update has now been shared on the status of some of these issues. The free Outbreak packs have been distributed, and players who already purchased 50 can get their free R6 Credits through the "conversion hub." Ubisoft is also in the process of distributing the Ash Elite skin, but players are warned it may take some time. As for the free Operators that all non-Starter Edition players should now have access to, Ubisoft states, "We are exploring the possibility of a mass grant, but need to do load tests first to ensure we do not crash the database, as this grant would be live and that carries a certain risk." It will provide a further update on that in the next day.

Update 2: Ubisoft has provided further details on a variety of the issues currently plaguing the launch of Siege's Chimera expansion. Regarding the free Outbreak packs that weren't awarded to players, they should be delivered sometime on March 7; those who have gone ahead and purchased all 50 packs will get the 1,200 R6 Credits those four freebies would cost as a refund. As for the Ash skin, that should be delivered sometime this week, but Ubisoft insists that everyone who should get it will receive it. The collection screen bug is still being worked on, and everyone who should have received the Damascus Steel weapon skin should now have it. The original story follows.