They do absolutely fuck all for the home country in terms of lobbying etc( muh invest doesn't count, they too make money out of it like some white skinned VC ), and their own community within the host country tho.
Now compare Turks, Pakis, PRChinese.
Or the Gold Standard, Zionist Jews, many even aren't Israeli citizens or been to that country.
There is a small amount of NRIs who do engage in lobbying or other such efforts, but they are a minority compared to the amount of wealth NRIs have and the amount of influence they could exert.
Can't blame these people, most our NRI boomers brought up in sekoolar soshalist ideology, 0 fucks given about a """country that only came into existence in 1947""" or their fellows or their religion and gods, and the GoI also doesn't seem to care from it's end.