I like kobo, but I do wish they would list what formats their books are available. (kepubs are kobo only).
The only trick I've found, that I've learned from somewhere in these forums, is to "Save Preview" first. Then go into your library on the site. Look underneath the title and author. If it is blank that means it is a kepub and can only be downloaded on a kobo/kobo app. If it is some other format it will say
Download options: EPUB (DRM-Free)
or
Download options: Adobe DRM EPUB
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