How to use right control on macbook air?

Secondary click

Select the option, then choose the gesture to use to secondary click (or Control-click) items on the screen.

Source of Above https://support.apple.com/en-ca/guide/mac-help/mchlp1226/mac

And45 wrote:

To use the app I need the right control, if I press left control nothing happens.

What app exactly?? and What is right control supposed to do in that app exactly??

Apple keyboards do not have that key, so an app intended for MacOS should not be requiring it.

And45 wrote:

I don't have right control on my macbook air keyboard, how to use it?

See if this helps

https://superuser.com/questions/48362/emulating-the-right-ctrl-key-on-macbook-pro-keyboard-lacking-an-actual-right-ctr

System Preferences >> Trackpad and check ( enable ) Secondary Click

" Right Control " - define what you are expecting to occur - please. Right Click will present a Secondary Menu pop-up Menu and can choose whatever options are offered.

And45 wrote:

I mean right control button

You have to tell us what you need that for exactly for anyone to help you. Is it something different than Left Control?

There is no control key to the right of the spacebar on that keyboard.

You can't "use" that which does not exist.

Any chance they are working in Windows OS and committing that key information ?