Tax Question: How would I report stocks from a foreign if the broker doesn’t create 1099 forms?

Is there a guide to better understand what I need to report? For example, my wife traded small amounts of stocks, but the apps she used, while in a different country (her home country), don't create 1099-Div, int, or B forms. How would I report these? I use the 1099 summaries from all of my brokers in the US so how would I do it for foreign assets?