All of the major eBook stores sell books with and without DRM (including Amazon Kindle, Rakuten Kobo, Apple Books, Google Play Books).
Whether an individual book includes DRM on all of these stores is down to the publisher, and you won't typically see books from the major publishers offered without DRM.
Most books Apple sells come with DRM.
This section of the Apple documentation explains how a publisher can control whether DRM is used for their book:
https://itunespartner.apple.com/books/support/30-manage-book...
All of the major eBook stores sell books with and without DRM (including Amazon Kindle, Rakuten Kobo, Apple Books, Google Play Books).
Whether an individual book includes DRM on all of these stores is down to the publisher, and you won't typically see books from the major publishers offered without DRM.