Where is the away button?

I’ve been looking for the away button while in flight. Can someone help ?

There is no button, just don’t touch the controls or screen for a few minutes and you will then appear as “away”

After not interacting with your device for two minutes you will automatically enter away mod, and this can be verified by the green check in the top right corner turning into an orange check. Once you wish to leave away mode when you have returned, press the check and it will turn green agaon

That was fast. Thank you very much.