I'm all for action against excessive packaging (as long as we don't cause food waste, i.e. by banning the plastic keeping fruits and vegetables edible for much longer) but nested plastics seems to be rather rare in my experience. Even sixpacks of cans come in cardboard packaging these days. It's been months since I last saw nested plastic packaging.
I've never seen any law specifically targeting straws. Most of the laws target single-use plastics, such as plastic cutlery and plates. The people focusing on straws seem to be "the damn liberal environmentalist communists want to make your life worse" types of media.