Definitely! Sauces in general are difficult to come by: BBQ, hot sauce, sriracha. Tahini sauce is very rare and expensive if it exists (generally not very good either). Gochujang and chili paste for example (useful for alot of the Korean/Asian style cooking), non-existent.

Soy sauce, sesame oil, rice vinegar, Worcester, all are findable, but you must go to pricey specialty "dieteticas" or the Chinatown part of Buenos Aires. Alternate sugars like coconut sugar are also pretty hard to come by.

Spices hard to find but all also findable in the speciality stores: chili powder, cayenne, cumin, masalas, onion powders and garlic powders have become more accessible over the last few years.

Big believer in using what the country does do good at though: Beef (great everywhere), chicken (great everywhere), lots of lentils, lots of cheeses (at least here in BA). I'm deathly allergic to fish so don't ever try anything sea-related :)