>I am not too familiar with the situation with the poverty in the US. Do people there still die from poverty-induced starvation in the 21st century?

I think the question needs to be a little more nuanced than that. Here are a few resources to get you started:

https://hungerandhealth.feedingamerica.org/understand-food-i...

https://www.npr.org/2020/09/27/912486921/food-insecurity-in-...

https://www.feedingamerica.org/hunger-in-america/food-insecu...

https://en.wikipedia.org/wiki/Hunger_in_the_United_States

https://www.ers.usda.gov/data-products/ag-and-food-statistic...

https://www.brookings.edu/blog/up-front/2020/11/23/hungry-at...

https://www.aamc.org/news-insights/54-million-people-america...