Remote event is client sided instead of server sided?

The objects you sent from the client (v,z,x) are only stored in the playerGui of the player. This is why it will not replicate to other clients. Instead you can use game:GetPlayers() and itterate through it with a for loop. For each itteration, you can update the guis elements inside the player gui to whatever you want.

Also, never trust the client. When you fired the remote event you gave some text label objects. This is not a good idea because exploiters can do the same thing, but change the textlabel.text property to something offensive and other players will see it.

Instead, you can rename the remote to something specific like "PlayerFoundSomething" and just fire the remote event with no arguments. Now if the exploiter fires to the server, it is impossible for the exploiter to change the text because the exploiter nor anyone can change the name of a player object (which is the only parameter by default).

Example:

-- Client

local rp = game.ReplicatedStorage
local remote = rp.Claim
local player = game.Players.LocalPlayer

script.Parent.MouseButton1Click:Connect(function()
    print("Claimed")
    script.Parent.Parent.FinishOrderFrame.Visible = true
    script.Parent.Parent.FinishOrderFrame.Parent = player.PlayerGui.FinishOrder
    remote:FireServer()
end)

-- Server

local rp = game.ReplicatedStorage
local remote = rp.Claim

remote.OnServerEvent:Connect(function(player)
	local players = game.Players:GetPlayers() -- All the clients in the game
	
	for _, player in pairs(players) do
		local playerGui = player.PlayerGui
		local textlabel = playerGui.Gui.textLabel
		texlabel.Text = "Claimed by: " .. player.Name

		wait(5)
		textlabel:Destroy()
		-- Customize this code inside of the for loop to your liking
	end
end)

I hope this helps :)