Can Metatables be used with IntValues, BoolValues, etc?

I'm trying to ensure that no player data in leaderstats is nil by using metatables. But I'm not sure if metatables can be used with Folders and IntValues.

Here's the code I wrote

	local leaderstatsMeta = {}
	
	leaderstatsMeta.__index = {
		function()
			print("Some data in leaderstats is nil!")
			coins.Value = 1
			multiplier.Value = 1
			rebirths.Value = 0
			steps.Value = 1
		end,
	}
	
	-- GetChildren returns this but I'm not sure there's another way of doing this or if it works
	--[[
	 {
                    [1] = Coins,
                    [2] = Multiplier,
                    [3] = Rebirths,
                    [4] = Steps
	}
	]]--

	setmetatable(leaderstats:GetChildren(), leaderstatsMeta)

Should I change GetChildren to something else? Is this even possible with metatables? (Sorry if my English is bad it's not my native language)

Hello, I am very new to metatables so I'm sorry if this is wrong but, here's how I would've done it, I think.

local mt = setmetatable(leaderstats:GetChildren(), {
	__index = function(tab)
		coins.Value = 1
		multiplier.Value = 1
		rebirths.Value = 0
		steps.Value = 1
		
		return "Some data in leaderstats is nil!"
	end,
})

for i, v in ipairs(mt) do
	if not v then --checks if v is nil
		print(mt[i]) --prints the return
	end
end