The heck is happening with roblox backpack replication?

So i made a server script which clones tools into player's backpack, simple. But there is that problem, i am trying to access those tools i cloned from local script in StarterPlayerScripts, i see them on my client in the backpack in the explorer and on the server too but the script seems to be blind and does not find anything in the backpack, i made while loop which gets amount of children from the backpack, it printed 0 for 12 generations, then, i tried to use WaitForChild for one of the tools, i have successfully created an infinite yield. Could anybody please explain me this? I am completely confused by that.

Codes:

Server script: When player gets added, it adds the tools from server storage

player.CharacterAdded:Connect(function(character)
			
			if character then
				local human = character:FindFirstChild("Humanoid")
				
				Call("LoadPlayerTools", player, tools)
			end
		end)

Local script: It should get the tools from the backpack

if backpack then
		local toolsToConfigure = {}
		
		for _, tool in pairs(backpack:GetChildren()) do
			if tool and tool:IsA("Tool") then
				table.insert(toolsToConfigure, tool)
			end
		end
		
		return toolsToConfigure
	end

Thanks, kirda

When you equip a tool, it moves the tool into your character model in the workspace, and when you unequip it, it goes back into your backpack. So when you equip your tool, it goes out of your backpack and comes back when you unequip it.

Hope this helps!