On trip advisor there were 332 restaurants https://www.tripadvisor.com.ar/Restaurants-g312741-c26-Buenos_Aires_Capital_Federal_District.html.
Not sure how to even address a post that's so wrong. So I'm just going to address this quote, which is the most wrong part. Practically every second restaurant in Buenos Aires has Italian food. The idea that there's only '332 Italian restaurants' in Buenos Aires is patently ridiculous when you consider that Italian food is almost always HALF THE MENU in any Argentine restaurant! Even parillas have pasta menus 2 pages long while every restaurant serves you bread on the table (which is a tradition that comes direct from Italy) etc. Italian food in Argentina is generally not marked as specifically 'Italian' food, because it's been integrated so strongly into the local cuisine.
This fact shows clearly that Italian identity is a core part of both the general culture and the gastronomy in Argentina. In all the places you listed, Italian food is specifically marked as such (and is for the most part utter Spaghetti and Meatballs, Alfredo etc style anglicised garbage), while in Argentina, the Italian influence is so strong it's just considered everyday Argentine food.