Are you aware of what "in accordance with ICAO Annex 13 " means ?
Yes, I am; in particular paragraph 5.9 - - - - viz :
5.9 The State conducting the investigation into a fatal
accident shall arrange for complete autopsy examination of
fatally injured flight crew and, subject to the particular
circumstances, of fatally injured passengers and cabin
attendants, by a pathologist, preferably experienced in accident
investigation. These examinations shall be expeditious and
complete.
Note.— Guidance material related to autopsies is provided in detail in the
Manual of Civil Aviation Medicine
(Doc 8984) and the Manual of Aircraft Accident Investigation
(Doc 6920), the former containing detailed guidance on toxicological testing
So it's reasonable to expect that that's what will happen . . . . .. . isn't it ?