Absolutely a 'tech' anymore isn't really a tech in most cases. They're certainly not going to analyze frequency response if the unit's working. Maybe do a reset or such and call it a day. Or if you bug support enough you might get sent a new unit. I doubt if they publicly acknowledge the problem at all, despite them probably addressing it in a firmware update. Then there's always the chance the new one still has the issue.
I can tell you though, steam deck is amazing.
well worth the cash, was just playing hogwarts legacy on mine.