Changing WalkSpeed when Character respawned?

I have been struggling with changing the walkspeed of a players humanoid upon them respawning after dying, i get no errors while testing - I am using RemoteEvent, i am not sure if that is neccesary

LocalScript is in the StarterCharacterScripts folder

-- LocalScript


local plr = game.Players.LocalPlayer
local char = script.Parent
local hum = char:WaitForChild("Humanoid")
local humroot = char:WaitForChild("HumanoidRootPart")

local function onDeath()
	game.ReplicatedStorage.AddStats:FireServer()
end

hum.Died:Connect(onDeath)


-- Script


game.ReplicatedStorage.AddStats.OnServerEvent:Connect(function(plr)
	local char = plr.Character
	local hum = char:WaitForChild("Humanoid")
	local gui = plr.PlayerGui:WaitForChild("ValueGui")
	local textLabel = gui.JumpValue
	
	local walkSpeed = hum.WalkSpeed
	local jumpPower = hum.JumpPower
	print("Stats saved!")
	
	plr.CharacterAdded:Connect(function()
		print("character respawned")
		char:WaitForChild("Humanoid").WalkSpeed = walkSpeed
		hum.JumpPower = jumpPower
	end)
end)

Walking speed does not need Remote Events, you can use humanoid.WalkSpeed to change a humanoid's speed.

hum.WalkSpeed = 0

Edit: If you place a folder in a player with 2 intvalues that change their values as the humanoid changes its jumppower or walkspeed, then whenever a player respawns their character you can change their jumppower and walkspeed to those values. This will now only not work on the client side, so you have to change jumppower and walkspeed on the server side. If jumppower doesn't work, make sure your humanoids are using jumppower and not jumpheight.

Script creating two intvalues inside players as they join:

local Players = game:GetService("Players")

local StarterPlayer = game:GetService("StarterPlayer")

local function PlayerAdded(Player)
	
	local Folder = Instance.new("Folder")
	
	Folder.Name = "PlayerData"
	
	Folder.Parent = Player
	
	local IntValue1 = Instance.new("IntValue")
	
	IntValue1.Name = "JumpPower"
	
	IntValue1.Parent = Folder
	
	IntValue1.Value = StarterPlayer.CharacterJumpPower
	
	local IntValue2 = Instance.new("IntValue")

	IntValue2.Name = "WalkSpeed"
	
	IntValue2.Parent = Folder

	IntValue2.Value = StarterPlayer.CharacterWalkSpeed	
	
	local function CharacterAdded(Character)
		
		local Humanoid = Character:WaitForChild("Humanoid")
		
		Humanoid.JumpPower = IntValue1.Value
		
		Humanoid.WalkSpeed = IntValue2.Value
		
		local function JumpPowerChanged()
			
			IntValue1.Value = Humanoid.JumpPower
		end
		
		Humanoid:GetPropertyChangedSignal("JumpPower"):Connect(JumpPowerChanged)
		
		local function WalkSpeedChanged()

			IntValue2.Value = Humanoid.WalkSpeed
		end

		Humanoid:GetPropertyChangedSignal("WalkSpeed"):Connect(WalkSpeedChanged)
	end
	
	Player.CharacterAdded:Connect(CharacterAdded)
end

Players.PlayerAdded:Connect(PlayerAdded)

Make sure to put this script in Game.ServerScriptService or Game.Workspace, as a server script of course.

Please let me know if my editing didn't help, I'll be happy to help.