Can a zombie (mob) with netherit armor spawn in Minecraft?
What kind of armor should he wear?
Netherite
/ summon zombie ~ ~ 1 ~ {ArmorItems: [{Count: 1, id: netherite_boots}, {Count: 1, id: netherite_leggings}, {Count: 1, id: netherite_chestplate}, {Count: 1, id: netherite_helmet} ]}
By the way, you can create your own summon command here:
https://www.digminecraft.com/generators/summon_mob.php
For example, if you want him to have a weapon too, or for the armor to be enchanted, or for him to drop certain things.