However, an easier way to input your SHiFT codes is within Borderlands 4 itself. Within the game's pause menu, you can access a SHiFT. Select the Rewards tab from the resulting menu, input your codes ...

These Borderlands 3 Shift codes unlock visual head cosmetic options, and also seem to be permanent.

Funko Fusion - How To Redeem Codes and Get Bonus CharactersIn each specially marked Funko Fusion Funko POP! figure there will be a code that can unlock one of five special versions of characters in ...