https://www.gamespot.com/articles/rainbow-six-siege-update-issues-include-missing-ou/1100-6457189/

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.

The rollout of the major new Operation Chimera update for Rainbow Six Siege is upon us, but players are encountering some hiccups on PC, PS4, and Xbox One. Ubisoft has confirmed a variety of known issues with both Chimera's additions and the new Outbreak mode, as well as one involving the free skin many players should have received. [Update: Ongoing server issues are said to have been resolved, but Ubisoft notes that it's investigating a problem where players have not received their four free Outbreak packs for logging in.]