[2022] The Battle of the North Cape Mission and Giveaway

Complete the mission chain, obtain a patch, and enter the draw for Scharnhorst or Duke of York! Read it on the portal

It sounds like you were referring to a Steam-specific thing. Some players were discussing that earlier in this thread: https://forum.worldofwarships.com/topic/262535-countdown-to-2023/

We do offer purchases in our Premium Shop and Armory, but we don't label them as "DLC". That's more of a term used on selling sites like Steam to described "added game functionality/options".