Cloning a ProximityPrompt to in a player's character won't be shown to other people?

Hello! I've been tried to make it so that, whenever reaching less than 20 HP, a ProximityPrompt will appear on the head of the person with low HP and will give the possibility to anyone except himself to suck his blood, which is done through another variable system that I do not require help with... I tried it with my friend but he says he cannot see it! Why?

--ServerScript in ServerScriptService

game.Players.PlayerAdded:Connect(function(plr)
	plr.CharacterAdded:Wait()
	local humanoid = plr.Character:WaitForChild("Humanoid")
	local db = false
	
	local walkspeed = tonumber(humanoid.WalkSpeed)

	humanoid.HealthChanged:Connect(function()
		if humanoid.Health <= 20 then
			humanoid.WalkSpeed = 0
			game.ReplicatedStorage.RemoteEvents.Draining:FireAllClients(plr)
		else
			humanoid.WalkSpeed = walkspeed
		end
	end)
end)

--LocalScript in StarterCharacterScripts

game.ReplicatedStorage.RemoteEvents.Draining.OnClientEvent:Connect(function(plr)
	local script1 = script.Drain:Clone()
	script1.Parent = plr.Character.Head
	wait(15)
	script1:Destroy()
end)

--Script used to suck the blood. (Not really necessary but I will still put it here.

script.Parent.TriggerEnded:Connect(function(plr)
  local sucker = plr
  local sucked = script.Parent.Parent.Parent
	
  if plr.Name ~= sucked.Name then
	sucker.Character:WaitForChild("Values").Blood.Blood.Value += 60
	print("SUCKING ON"..sucked.."DONE BY"..sucker.." AMOUNT:"..sucker.Character.Blood.Blood.Value)
	sucked:WaitForChild("Humanoid").Health = 0 	
	else
	end
end)

Please help!