What’s the deal with 4 Nations collectibles?

4 Nations is outside of HUT I see. I picked my player but could someone please share what the process to get the collectibles is, and how long it takes?

Many thanks.

Sorry for asking but I'm late to start my HUT week due to vacation and illness and making TOTY McDavid and MacKinnon one fugging card at a time. Now blasting thru squaddies. Appreciate any help.