I made a datapack that allows you to craft chain armor : r/Minecraft

Chainmail Armor Minecraft Data Pack

Realistic Chain Armor Minecraft Data Pack

1.18 Craftable Chainmail Armor! Minecraft Data Pack

Craftable Chainmail Armor [Bedrock] : r/Minecraft

Recipe book – Minecraft Wiki

Chains Plus Data Pack (1.19.4, 1.19.2) - Upgrade Your Chainmail

Mojang added armor customization to Minecraft 23w04a! #minecraft

Creative inventory – Minecraft Wiki

Chainmail Armor Minecraft Data Pack