I think you mistook OEM for aftermarket there.
OEM means original equipment manufacturer. In case of the EX30, the OEM is Saint-Gobain Sekurit. The company Volvo buys their glass from (they don’t make their own, obviously) – you guessed it – is also Saint-Gobain Sekurit. Volvo just puts a Volvo sticker in some corner of the glass, increases the price by 30%, and pushes it out the door making sure that you as the customer know to only ever buy the “genuine Volvo part”.
At the very best, you could call Volvo a VAR, but that doesn’t make a spare they had zero part in manufacturing in, “genuine”. It’s Saint-Gobain Sekurit glass with a Volvo sticker (where the VAR, or “value added reseller”) comes in. Same for Bosch (or Denso/NGK) sparkilators. They’re not “genuine Volvo parts”, they’re Bosch parts with a Volvo sticker and more expensive.
If the mechanic didn’t break the camera, there would be 100% zero issues with OEM glass.
Prior: SEAT Ateca Xcellence Lux 1.5 TSI DSG MY19, VW Golf GTE PHEV DSG MY23
Current: Hyundai Ioniq 6 Ultimate
Next: we'll see what's available in 2028.