yeah, i saw it too near Jimboomba flying low and slow, quiet as not climbing. Not an E Jet. Widebody, underwing engines, winglets, suspect things hanging from wings outboard of engines (view thru trees), heading towards Amberley. My guess MRTT (Multi role Tanker Transport), Airbus A330 converted to refueling aircraft, looking orange in setting sun.
Checked flightradar24 and it didn't show, hinting it is military aircraft.
The shape of the winglets was most A330 like.