Yep. It's pretty much industry standard on mid-range performance cars and trucks. Many manufacturers are moving to smaller I4 and V6 turbocharged engines on models that traditionally had big V8s. These smaller engines provide great efficiency and good performance, but they're much quieter and blander-sounding than the old V8s. Subtle digital augmentation of the engine note restores some of the feeling of performance at trivial cost.

https://www.caranddriver.com/features/faking-it-engine-sound...

https://www.ford-trucks.com/articles/f-150s-fake-engine-nois...

I was under the impression that some electrics and hybrids in electric mode played simulated engine noise through speakers to both alert nearby pedestrians that the vehicle is moving and to reassure the driver that it is operating normally.

I wouldn't put it past a manufacturer or aftermarket parts maker to play "vroom vroom" noises over the sound system at speeds too low for the driver to actually hear anything from the passenger compartment. If you can put an aluminum spoiler on a stock Honda Civic, you can put an engine noise simulator on your sound system.

The Jaguar I-Pace does this [1]. It's the stupidest thing.

[1] https://electrek.co/2018/03/07/jaguar-i-pace-artificial-moto...

Some BMWs do this: https://www.autoblog.com/2011/09/23/active-sound-design-enha...