In some games (for example in EuroTruck Simulator 2), the reaction threshold can be adjusted so that a look in the right eye mirror is already possible with a small head movement. however, this always depends on how far the device is directly supported by the game.

A list of supported games can be found on the manufacturer's website.

https://gaming.tobii.com/games

In Assassin's Creed, you can use it to mark targets, move the camera slightly with your head, and a few other things that require you to look ahead.

I don't have any experience with racing games, but since the tracker senses the head movement, a slight turn should translate into the game. Whether it then only reaches as far as the side mirror or directly to the rear is another matter. I would simply check this beforehand with the specific game before buying it.

Hello Marco. The eye tracker has no influence in games yet, at least I haven't found such a game yet. The eye tracker also works with the recognition of the eyes through this black bar, which is placed in front of you. So if you look backwards, it can't scan your eyes and therefore it can't recognise what you're doing. It is a very specialised device.