Hi so this will be a very obscure suggestion, all I'd like is compat for gilded netherite with the netherite horse armor mod:
https://www.curseforge.com/minecraft/mc-mods/netherite-horse-armor-fabric
Or implementing netherite+gilded horse armor into the mod all together.
Might seem stupid but in my opinion it doesn't hurt to add it and would show some respect for horses.