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.
I see a large gray box and little else!
But if you read English books in an English-speaking country and you semi-regularly visit a English language bookstore, she is a big deal.
If you look at the first picture of this article in the New Statesman:
https://www.newstatesman.com/%E2%80%8Beimear-mcbride-goldsmi...
She is the person right in the middle.
Margaret Atwood has written much more than those two books - she is a prolific author. According to Wikipedia she's she has published 17 books of poetry, 16 novels, 10 books of non-fiction, eight collections of short fiction, eight children's books, and one graphic novel, as well as a number of small press editions in poetry and fiction. Her works are popular, both with the general public and with critics.
That reads to me like a post-facto characterization based on perspective rooted in today's political climate. Personally, I find her books to be somewhat overrated compared to other works of "genre fiction", but having read some of her books, the "feminist" characterization as you are presenting is misleading.
https://www.google.com/search?q=margaret+atwood+-feminism&rl...