[Solved]Why when I clone this part the code doesn't work inside of it?

There is no point in even creating a new script instance every single time. You can just hook it up to when you create the part.

Another thing you did wrong is that you are using the PlayerAdded event to get the player, however this is only fired when a player joins the game.

Don't worry though! We can easily find the player through the character. I will display how in the script below.

Another thing that I will add is that collisions are very easily spammable. We are going to fix this by disconnecting the Touched event.

I commented the script I wrote for you a fair amount but do let me know if you have any questions.

One thing that I am worried about is the amount of bullets you are creating. 10 bullets per second can become very laggy very quickly. Consider upping the time delay. Up to you though.

Like so,

while wait(0.1) do
	local bullet = game.Workspace.Bullet:Clone()
	local jump = game.Workspace.Jump:Clone()
	local invisible = game.Workspace.Invisible:Clone()
	local health = game.Workspace.Medkit:Clone()
	local speed = game.Workspace.Speed:Clone()
	bullet.Parent = workspace
	bullet.Position = Vector3.new(math.random(-205, 186), 20, math.random(-132, 262))

	-- Let's make a variable for a connection so that we can access it later
	local connection
	connection = bullet.Touched:Connect(function(hit)
		local humanoid = hit.Parent:FindFirstChild("Humanoid") or hit.Parent.Parent:FindFirstChild("Humanoid") 
		-- sometimes it may touch a hat, for example.
		
		if humanoid then
			-- Okay so now we know whatever hit the bullet has a humanoid
			-- Let's make sure that it's a player
			
			local char = humanoid.Parent
			local hitName = char.Name
			
			local player = game:GetService("Players"):GetPlayerFromCharacter(char)
			
			local DoubbleeBulletGamepass = true
			-- DoubbleeBulletGamepass is kind of unnecessary, but
			-- I am guessing it will have use in future so I'll keep it here for you
				
				
			if player then
				if typeof(connection) == "RBXScriptConnection" then
					-- Could == nil and error so let's avoid that.
					-- This will avoid collision spam so that we don't get too many bullets added
					connection:Disconnect()
				end
				local bulletLeft = player:WaitForChild("leaderstats"):WaitForChild("BulletLeft")
				local maxBullet = player:WaitForChild("leaderstats"):WaitForChild("MaxBullet")
				
				--// Bullet addition logic
				if bulletLeft.Value < maxBullet.Value then
					
					if DoubbleeBulletGamepass == true and bulletLeft.Value <= 4 then
						bulletLeft.Value = bulletLeft.Value + 2
						
					elseif DoubbleeBulletGamepass == true and bulletLeft.Value < maxBullet.Value then
						bulletLeft.Value = bulletLeft.Value + 1
						
					elseif DoubbleeBulletGamepass == false and bulletLeft.Value < maxBullet.Value then
						bulletLeft.Value = bulletLeft.Value + 1
						
					end
					bullet:Destroy()
					
				elseif bulletLeft.Value >= maxBullet.Value then
					print("you have max ammo")
				end
			end
		end
	end)
end

Also, this script will now work and you can delete whatever script is inside of Bullet.

Please accept my response if I have answered your question :)