I think it would be hard to somewhat regularly buy books or go to a (typical English language) bookstore without seeing anything about Margaret Atwood.
But maybe there is a large world of English speaking people who don’t at all follow book releases or tv or even headlines in the mainstream news (where her winning of awards would be announced).
The past month you cannot have entered any decently sized bookshop carrying new titles without encountering her name with The Testaments out. In my local bookshop I find the hardcover original English edition, its Dutch translation, The Handmaid's Tale in English and Dutch in editions ranging from paperback to luxury hardcover, and a bunch of her other works.
Before that, The Handmaid's Tale has been prominently displayed ever since the TV series came out.