A simple datapack mod make can updata equipment.
Discord Link: https://discord.gg/pDaMyHDfBy
It add some recipes can help you updata your equipment in smithing table.( also iron and golden equipment to diamond).
you can updata stone and leather equipment to iron equipment.
In 1.20 due to updata equipment need template，so this mod also add a recipes to help you recipes upgrade smithing template.
8 planks + 1 cobblestone
