Respawning where I left last time?

To make this, we need to save the position in a DataStore. Here is a rough example.

local PositionStore = game:GetService("DataStoreService"):GetDataStore("PositionStore")
game:GetService("Players").PlayerAdded:Connect(function(player)
    local Character = player.Character or player.CharacterAdded:Wait()
    local Success, LastPosition = pcall(function()
        return PositionStore:GetAsync(player.UserId)
    end)
    if Success and LastPosition ~= nil then
        wait(1)
        Character:MoveTo(Vector3.new(LastPosition.X, LastPosition.Y, LastPosition.Z)
    end
end)

game:GetService("Players").PlayerRemoving:Connect(function(player)
    local Character = player.Character
    pcall(function()
        local CurrentPosition = {
            X = Character.HumanoidRootPart.Position.X,
            Y = Character.HumanoidRootPart.Position.Y,
            Z = Character.HumanoidRootPart.Position.Z
        }
        PositionStore:SetAsync(player.UserId, CurrentPosition)
    end)
end)