In my modpack I'm using some horse improvement mods and then I noticed this small problem: even though the netherite armor accepts the enchantments from "Shiny Horses - Enchantable Horse Armor", the texture of the armor goes inside the horse on its body . I think it's just a visual problem, but I thought it would be worth pointing out anyway.

I'm not sure if the compatibility issue is actually related exclusively to these two mods, so I'll leave a list of the mods I installed targeting horses here anyway:

Shiny Horses - Enchantable Horse Armor
Simple Netherite Horse Armor
Horse Buff
Horse Whistle
Horse Expert.

(ps.: Looking at the list you should notice that some of these mods are exclusive to fabric, but I'm not using them on fabric, I'm using the "Sinytra Connector".)

Horse with netherite armor

Horse with enchanted netherite armor

Horse with enchanted netherite armor (fadeout of the horse buff, veiling the armor inside the body)

Thank you for reporting this! On first glance I don't at all know what might be causing this, it's a very strange issue, but I'll try to look into it properly in a few days