Just because you haven’t heard of it doesn’t mean it doesn’t exist, or doesn’t happen. Another poster already linked the Wikipedia article, but they’re called Filial Responsibility Laws. The states that have them are:
Alaska Arkansas California Connecticut Delaware Georgia Indiana Kentucky Louisiana Massachusetts Mississippi Nevada New Jersey North Carolina North Dakota Ohio Oregon Pennsylvania Puerto Rico Rhode Island South Dakota Tennessee Utah Vermont Virginia West Virginia
Iowa used to but they got rid off them in 2015.
From what I can tell, it’s based off the state the parent lives in.