What Mel and MC said^^^^. Littermate Syndrome is real and if it occurs in your 2 sibling pups, It can cause serious problems for both the dogs and the owner.
You should research it thoroughly before finalizing a decision to keep 2 littermate.
Here is a pretty decent article on the subject: https://thebark.com/content/dont-take-two-littermates/
Oh! And welcome to DT from the Pacific NW!