Items obtained during the Second Open Beta Test can be carried over to the official release.
(This includes Battle Pass rewards, items purchased in the Daily Shop, etc.).
To transfer items, you must link your account with either a Discord account or a MyDearest account.
Check the article below for details.
https://store.steampowered.com/news/app/2511050/view/4196872969284395800?l=english
*You will not be able to transfer your data from the First Open Beta Test in February.