Does this DataStore Global Function work?

The best way to go about doing this is using a module script.

So this is how you can set up the module script:

local module = {}

local DataStore = game:GetService("DataStoreService"):GetDataStore("PlayerStats")

function module.LoadData(key)
	local SavedValues = DataStore:GetAsync(key)

    if SavedValues then
        return SavedValues
    else 
        return "NoData"
    end 
end

function module.SaveData(key, data)
    DataStore:SetAsync(key, data)
end

return module

Now that your module script is set up, all you need to do is call require from any other script, and then you will be able to call the functions that you set up in this script.

Script example:

local sss = game:GetService("ServerScriptService")
local moduleScript = require(sss.Script) -- assuming the module script is under serverscriptservice and is called 'script'

-- loading data
local data = moduleScript.LoadData(key)

-- saving data
moduleScript.SaveData(key, data)

Hope this helped!

Note: When saving data, use the player's userId as the key, and not their name, because users are able to change their names