@NoelRubio Members of Family unit are Spouse and children lang, not parents nor siblings.
https://www.homeaffairs.gov.au/Migrationagents/Pages/member-of-family-unit.aspx
A member of your family unit can be your:
partner – married or de facto (same or opposite sex)
or
dependent child, up to 23 years of age (there are some exceptions, see below under Eligible child below).
https://www.homeaffairs.gov.au/trav/visa/incl
so if may hindi ka isasama sa application mo na spouse or children, then saka mo sya i-yes.