According to this tweet, the hackers likely got ALL of the data but only leaked a subset, 1.3 million records (only the ashkenazi Jews)
This means a typical Ashkenazi Jewish customer of 23andMe has a lot more relatives than most other customers, and so they'd be able to view that many more profiles.
(as to how I verified: the file is still available on the leak site)
These are the headers:
profile_id; account_id; first_name; last_name; sex; birth_year; has_health; ydna; mdna; current_location; regions; subregions; population_ids
First entry is Elon;Musk;Male;1971;...But yes, for EM it said "Ashkenazi;Balkan;British Irish" - no percentages in there - and I believe 23andme has confirmed the authenticity of the data.
If I live a hundred years I will never understand people’s obsession with the Jews