[Vibgyor5]

Giving you real example of buying SIM card in 3 countries (Thailand, Vietnam, Russia) within last 6 months:

You step into the shop/kiosk at the airport (or in the city, however you prefer). They ask you to choose any SIM with desired numbers, plans are clearly well-written, take xerox of your passport (or click a snap of it), and plug the SIM in, pay money, reboot phone, and that's it. It did not take me more than 10 minutes in any scenario.

In all cases, it is cheaper (than using Airalo - and why are we promoting one app anyway!)and less hassle-free than buying eSIM.