I’ve been to many countries - the only time I saw guns drawn was the airport at Munich, Germany, and they were rifles, not handguns.
Those ‘rifles’ were probably H&K MP5s in 9mm, short barreled.
I remember flying into Heathrow once (in the 1970's) and they had tanks on the tarmac for some reason. I've seen drawn guns in Brussels and Moscow, and once in Algeria I had a gun aimed at me for taking out a camera when I was out on the tarmac (yes, I put the camera away).
I can;t say I've seen them drawn, just carried. In Frankfurt, it is two man teams, each with a submachinegun.
Saw lots of AR-15 rifles in the US after 9-11. National Guard, IIRC, was tasked with airport security for a few months. Made some people feel more secure.