The 13+ age indicator can be hidden by running this code on the client:
game.StarterGui:SetCore("TopbarEnabled", false)
game.StarterGui:SetCoreGuiEnabled("Health", false)
wait(1)
game.StarterGui:SetCore("TopbarEnabled", true)
It works in Studio and online but never on Xbox.
Repro: Age Indicator Bug.rbxl (556.2 KB)