Yup, the in universe knowledge of the events of Infinity War before people actually started getting dusted was quite minimal. Basically they knew some aliens showed up in New York and then Iron Man went missing. Strange missing isn’t news, Peter Parker missing isn’t real news, nobody had any idea about Thanos existing, his plans, Vision’s importance to them, etc.
The only thing large scale thing that even happened on Earth after New York 2 Electric Boogaloo was a pretty fast battle in a remote section of Africa.
There’s really no reason why anybody would know that something catastrophic was looming until it actually started happening — and the second post credits scene is pretty clear about this with Fury, one of the most well informed people on the planet vis-a-vis aliens and Avengers, not even knowing what was happening in Wakanda until Thanos achieved his goals.