Might be a difficult concept for you, but two things can be true at once, Indian immigrants tend to have more education than Hispanic immigrants, and both are more likely to have more family members than just a nuclear family living together, than non-hispanic white peopleHispanic households are shown to be larger than Asian households, yet they have lower median incomes than Asian households. So this graphic is most likely reflecting the fact that white people tend to have less kids than immigrants. Which is very true.
Income is directly proportional to education. Indian immigrants tend to be better educated, have higher education levels and therefore higher incomes. Multi-generational households may have an impact, but it is less common, than most Indian immigrants being better educated and having better jobs that pay well. Education is the key.
Indian migrants to US better educated, have higher incomes than others: study
On average, households headed by an Indian immigrant had a median annual income of $150,000 in 2021, compared to $70,000 for all immigrant- and native-led households, the study, made public earlier this month, showed. In 2021, Indian immigrants were less likely to be in poverty (5%) than...economictimes.indiatimes.com