If you’re creating a “Folder” instance from the client then it won’t replicate to the server, instead you need to instance the folder from the server, so that it replicates to the server and to the client.
local players = game:GetService("Players")
players.PlayerAdded:Connect(function(player)
local _stats = Instance.new("Folder")
_stats.Name = "Stats"
_stats.Parent = player
end)
Put this in a server script inside the ServerScriptService folder.
Uh, you know that since you’re doing it on a localscript, it won’t replicate to the server right? You should do a thing like Players.PlayerAdded:Connect() then cloning and parenting the stats to the player.