Simply put, I've gone through a large chunk of act one and I feel as though the game has done little to nothing to really introduce me to the setting of Faerun.
Or 5th Edition D&D for that matter. As I said elsewhere this is a generic Larian RPG with a very THIN layer of D&D whitewash, while advertising as much more so.
I think this is partially WotC's fault. The storyline picks up right after Descent Into Avernus, which was a problematic module at best. Many theorise that Baldur's Gate itself was supposed to be dragged into Avernus, but WotC chickened out and made it Elturel instead. The whole first act of DIA is set in BG for no reason, other than people love/have heard of BG. So Zevlor telling us that they're refugees from Elturel means almost nothing.
Even then, I can't think of any 5E module that does a good job of taking advantage of the setting. Faerun really hasn't gotten a lot of love in 5E, we have a little on the Sword Coast and that's it. Not saying Larian can't do better, but remember they're doing this with WotC's involvement and blessing, such as it is.