The Samscene New York scenery has lots of people in Time Square but it is kind of pointless. Its a notionally fun thing I guess.
There are now tons of airports and airfield scenery add ons that have people in them and thats probably as much as you’d ever really need in the sim for that extra bit of immersion, if thats what you like.
There’s also some add ons out there that put them out in the country but again its kind of pointless. Even flying low and slow with a helicopter you still struggle to see them.
I don’t really see the point in them in cities when cities look terrible close up anyway.