Include Armor in openInventory() Kotlin

I am trying to write a, minecraft, program where I can type /invsee "target" and I will be able to see the players inventory in real time. With the following code its easy to see the players inventory

val targetInventory: Inventory = target.inventory
player.openInventory(targetInventory)

but I really want to be able to see their armor as well which this wont show. I have been trying to add the players armor to be added into my own inventory in slots 9-12, to avoid creating a whole new inventory with expanded dimensions(not sure if this will be necessary). The issue I am running into is getting the pieces to be dynamic and disappear/change when the target player takes off/changes their armor pieces.

private fun addArmorToPlayerInventory(player: Player, target: Player) {
        val armorItems = arrayOf(
            target.inventory.helmet,
            target.inventory.chestplate,
            target.inventory.leggings,
            target.inventory.boots
        )
        for (i in armorItems.indices) {
            player.inventory.setItem(9 + i, armorItems[i] ?: ItemStack(Material.AIR))
        }
    }

What is the best way to get dynamic values and display them with the rest of the players inventory?

I think the best way to do this is by keeping track (e.g., a Map<UUID, UUID>) of who is watching whom and listening to the following two events:

• PlayerItemBreakEvent: Triggered when an armor piece's durability falls to 0.

• InventoryInteractEvent: Triggered when there is an interaction with the inventory.

These two events will allow you to detect changes in the target's armor slots and update the items in the watchers' inventories accordingly.