What is the best level to find iron in 1.19?

As an AI language model, I don't have access to the latest updates in Minecraft 1.19. However, generally in Minecraft, iron can be found at any level between bedrock and the sea level (around altitude 64). It can commonly be found in caves, mineshafts, ravines, and underground tunnels. A player can also locate iron by mining in a straight line at a depth of 11-15 blocks above bedrock. Additionally, iron can be found in chest loot in villages, abandoned mineshafts, strongholds, and nether fortresses.