Visual Bug with Detail Armor Bar
The visual bug is visible with any armor from the mod, with or without enchantments, With or without a texture pack, the bug persists.
No mod conflict, I tested with only the Details Armor Bar, Advanced Netherite, and Fabric API mods.

Images
With full set of the Netherite-Iron Armor.

Without Netherite-Iron Boots.

Without Detail Armor Bar, it works perfectly.

Versions

• Minecraft-version: 1.21
• ModLoader-version: Fabric 0.15.11 (0.100.3+1.21)
• Mod-version [Advanced Netherite] : fabric-2.1.5-mc1.21
• Mod-version [Detail Armor Bar] : 2.6.3+1.21-fabric

I've investigated the issue and it seems to be caused by Detail Armor Bar. I've opened an issue to notify the author of the mod about it.

Leaving this issue open until the bug has been resolved.