This is a highly unscientific poll, of course, but it is interesting: on the Sporcle quiz of open-era grand slam winners, Azarenka rates behind Kerber, Kvitova, Wozniacki, and Halep among her approximate contemporaries, just a hair above Mary Pierce (who retired over half a decade before Azarenka won a major), and a decent ways ahead of Kuznetsova (fair enough).I think you're still overestimating how well known she. Outside of tennis, I highly doubt many people could name Victoria Azarenka. Like, if someone in their 20s or 30s were asked to name 10 female tennis players, I don't think she would come up often at all.
She's behind Barty and Stephens, which I'll chalk up to recency, but it's interesting that she's also behind Bartoli.
I really don't think many folks outside of tennis could pick Azarenka out of a line-up, or come with her name without prompting.
But I think that's true for most players. I doubt Naomi Osaka is known outside of tennis fans or sports fans who casually pay attention to tennis. Wozniacki never did get that Elle magazine cover in America, did she? Ana Ivanovic rates even lower on that Sporcle quiz.
Tennis doesn't break through like it used to, and Azarenka wasn't a player who tried very hard to break through.