Helicopter research progression by playing ground vehicles

in the road map, it says that it has been implemented, however I don’t see my helicopters progress improving unless I play with a helicopter, so I would like to understand why it doesn’t work since it appears that they have implemented this thing

there is a button in the tech tree u have to activate it before it is possible

thank you

And where is the button to avoid joining battles against helicopters? I’ve already deactivated the one of joining ongoing battles.

U cant avoid battles were helicopters or planes are

Ok, I’ll keep leaving matches then.