Me and my friend booked our flights from LAX to ICN together and have a layover in PEK Beijing. When we go to the immigration and customs counters, would we approach them individually or together? This is my first time traveling outside the US so I’m just a bit nervous and all haha.
I would stay together till the last, stepping up to the officer alone. That way you can explain you travel together but are not a (married) couple.
It is rather likely that the officer wants to see you separately as you only travel on the same booking.
Staying together helps you to keep track of each other, which is a minor advantage.
In some places you will be told to go to different officers, if so, do that. It will not be a problem.