For a general description of services related to pensions, social security, and retirement savings abroad, you can consult the dedicated page on the website of the Italian Ministry of Foreign Affairs and International Cooperation: https://www.esteri.it/en/servizi-consolari-e-visti/italiani-all-estero/sicurezzasociale/
In the United States, there is a widespread network of patronati (patronage offices) that you can turn to for any matters concerning the subject. Click here to download the list.