Why is my Save playerdata script not working?

Here is DataStore script I have that works

local dataStoreService = game:GetService("DataStoreService")
local leaderstatsDataStore = dataStoreService:GetGlobalDataStore("leaderstats")

local loaded = {}

game.Players.PlayerAdded:connect(function(player)
	local leaderstats = player:WaitForChild("leaderstats")
	if player.UserId > 0 and player.Parent then
		local leaderstatsData = leaderstatsDataStore:GetAsync(player.UserId)
		if leaderstatsData ~= "Request rejected" then
			if leaderstatsData then
				for i, Stat in ipairs(leaderstats:GetChildren()) do
					local value = leaderstatsData[Stat.Name]
					if value then
						Stat.Value = value
					end
				end
			end
			loaded[player] = true
		end
	end
end)

game.Players.PlayerRemoving:connect(function(player)
	local leaderstats = player:FindFirstChild("leaderstats")
	if leaderstats then
		if loaded[player] then
			local leaderstatsData = {}
			for i, stat in ipairs(leaderstats:GetChildren()) do 
				leaderstatsData[stat.Name] = stat.Value
			end
			leaderstatsDataStore:SetAsync(player.UserId, leaderstatsData)
		end
	end
	loaded[player] = nil
end)

This is a little hard to explain so basically When a player joins we wait for their leader stats to be created from the script below, then we make sure that the player Userid is loaded by making sure it's above 0, after we load are leader stats and create a loop for each stat replacing the values as needed. Now for saving them we do the same thing by locating their leader stats, then creating a table and inserting each leaderstats into that table, and then sending that table to the dataStore

And as far as your leader stats you do need to name the folder "leaderstats" or else it will not work

Here is an example of the leader starts script I have:

local StatsTable = {
	"Cash",
	"Rebirths",
	"Kills",
	"KOs"
}


game.Players.PlayerAdded:Connect(function(p)
	local leaderstats = Instance.new("Folder", p)
	leaderstats.Name = "leaderstats"
	
	
	for i = 1, #StatsTable do
		local stat = Instance.new("IntValue", leaderstats)
		stat.Name = StatsTable[i]
		stat.Value = 0 
	end
	
end)

To explain this script P is Player and all I'm doing is when the player is added I create a folder and make the parent the player, Then I name it accordingly.

In the For loop, it just goes through each Stat I have in the table above and creates a new IntValue and names it, and sets it to value accordingly.

Hopefully, this helps, or at least you can use it to try to see if you can make some sense out of it.