I was messing around with Horseshoes and Shiny Horses in a 1.20.1 mod pack and found frost walker would not work when regular horse armor was equipped. Having only horseshoes on the horse would allow frost walker to work. Taking Shiny Horses out of the pack fixes the issue. I tested with the two mods in their own pack and the same issue occurs. I didn't test other enchantments but I could assume they may be facing the same issues.
I was messing around with Horseshoes and Shiny Horses in a 1.20.1 mod pack and found frost walker would not work when regular horse armor was equipped. Having only horseshoes on the horse would allow frost walker to work. Taking Shiny Horses out of the pack fixes the issue. I tested with the two mods in their own pack and the same issue occurs. I didn't test other enchantments but I could assume they may be facing the same issues.