How do I save NumberValue on a leaderboard?

I've heard that NumberValue doesn't really save on the leaderboard. I don't know if it's true or my script is just messed up or something like that. I need help with it. This is my leaderboard script, what do I do to make it save?

local DataStoreService = game:GetService("DataStoreService")
local DataStore = DataStoreService:GetDataStore("SkinStats")

game.Players.PlayerAdded:Connect(function(Player)
    local Leaderstats = Instance.new("Folder")
    Leaderstats.Name = "leaderstats"
	Leaderstats.Parent = Player
	
    local JumpPower = Instance.new("NumberValue")
	JumpPower.Name = "Jump Power"
	JumpPower.Value = 0
	JumpPower.Parent = Leaderstats
	
	local Wins = Instance.new("IntValue")
	Wins.Name = "Wins"
	Wins.Value = 0
	Wins.Parent = Leaderstats
	
	local PremiumDouble = Instance.new("BoolValue")
	PremiumDouble.Name = "PremiumDouble"
	PremiumDouble.Parent = Player
	
	local Data = DataStore:GetAsync(Player.UserId)
	if Data then
		JumpPower.Value = Data["Jump Power"]
		Wins.Value = Data["Wins"]
	end
end)

game.Players.PlayerRemoving:Connect(function(Player)
	DataStore:SetAsync(Player.UserId, {
		["Jump Power"] = Player.leaderstats:WaitForChild("Jump Power").Value; 
		["Wins"] = Player.leaderstats:WaitForChild("Wins").Value; 
	})
end)