So, you're upset because they showed pop-in
only in one scene in the trailer, which was meant to show what the final XSX console-spec game will look like. You then deduce that they are "covertly" tricking us all into thinking the game will have pop-in by showing us pop-in. You also claim it only happens in the trailer.
Have you run this software on a PC or even seen it run in-person? It's been out for a while now. There are a ton of instances where that happens, with a poor connection it's basically constant regardless of location, but can increase with area complexity and it's more prevalent as you get really close to the ground as it loads in the highest LODs available. This trailer is 100% representative of the actual thing running at mid-high PC settings which is what I expect the XSX will be using. Even a PC with an RTX3090 will struggle to hit 4K/30 in some instances, performance in this sim is not a consistent thing either. It's actually possible to be network bottlenecked in this sim, not just hardware limited.
Notice the pop-in as the plane gets lower to the ground. Things are popping in closer to the camera after other things pop in further away even on Ultra settings. That's because the game is constantly streaming photogrammetric map data for the entire city from the cloud, not just loading everything from local memory. Loading up millions of data points through an internet connection to populate the map isn't something any game has ever really done before, not at this scale and speed. On poor connections the pop-in is even more erratic.
This sim does not adhere to the concept of "locked framerates" either. You clearly don't understand what this software even is and it's clearly not meant for you.