Australia does not have a certification process for "good health info" but Australian health agencies promote health literacy, educating the public about trusted sources and guidelines, and many are well written in plain English. There has been continuing effort made to make these available in many other languages.
There is a health informaticians certificate offered in Australia for practitioners by the Australian Institute of Digital Health.
Health activist and health consumer representatives continue to be active in influencing and lobbying these Australian agencies to do their job as well as possible.
HIFA profile: Ann Lawless is a sociologist and patient representative, currently based in Australia. She has worked in a community health centre as a health worker, has taught health issues at university level including Indigenous health; and has an active and long term interest in health advocacy. https://www.hifa.org/support/members/ann