The best way to find new YBA: New Universe codes is to keep an eye on the official Roblox YBA: New Universe page. The developers often post new codes there, as well as news and updates about the game.

All Expired Codes in YBA on Roblox YessirMy3VampMainsRiseUp — Use code for a Mysterious Arrow, 5 Rokakaka, and 1 Pure Rokakaka FreeStandSkin — Use code for Lucky Arrow ...