The monitor in the passenger compartment is missing McLaren GT3

good evening, why the Mclaren, unlike Rfactor 2 and Assetto Corsa Compatizione, does not have the internal camera that works as a rear-view mirror ?, does anyone know if it will be inserted in the future?

 

I think it is because the Mclaren 720S GT3 doesn't have it in real life.

 

and how do they in real life in the race, to see who is behind?

 

I think they use the side mirrors.

Meanwhile, I have done another search, the rear-view and tire-pressure monitor are optional in real life, I don't know if they are bound by regulations
AMS2 left the options out, I don't miss it, but you never know what the future will reveal