forgot to add , hearing the turbo is common on remapped cars with extra boost.
Mine was quiet before I remapped it
You need to check your boost levels with a gauge or VCDS , you may have a boost leak , either by unsecured hoes or by somehting like a failing diverter valve (common). Get the requested vs actual boost and compare to other cars with the same spec
If you have followed a good oil schedule and not abused it from cold, not used crazy boost, I wouldnt be too worried that its a terminal failure...