People stated they supported the policy after reading a full description of the policy. If you don't trust the paper (whose researchers are anti-euthanasia), the Canadian government found the same results. https://researchco.ca/2023/05/05/maid-canada-2023/

Nobody ever correctly answers questions about legislation, to put it glibly. Any piece of legislation newer than 10 years and more complex than a sentence is not going to pass such a test with the general public. 19.2% knew that terminal illness is not required? I would be shocked if 19.2% could correctly answer a few basic questions about the definition of "terminal illness."