Given they've been recent in the latest copper age updates, it'd make sense to add Copper Chains, Copper Bars, and maybe Copper Chests and Copper Torches/Lanterns to this mod

not sure, it might be a good idea for this mod to serve as a copper backport given it does half of the copper stuff anyway? absolutely fine if that's not the aim of the mod though, but I think it's still a good idea to add more copper deco blocks

I will think about it, but however, If I do ever add this, I will try to make it retain the mod’s copper color palette & it’s texture style.

The question of this mod being a “Backport” is very unlikely, As the Mod uses “copperequipment” as the main identifier for items and blocks.
But if you’d want a real backport, go check out the creator behind these! https://www.curseforge.com/minecraft/mc-mods/perfect-parity-the-garden-awakens-edition
https://www.curseforge.com/minecraft/mc-mods/perfect-parity-spring-to-life-edition

But dw, I’ll still think about what you’d said about adding in Chains, Copper Bars, Copper Chests and Copper Torches/Lanterns.