Kate Clanchy was not a victim of "cancel culture" in any way, and her behaviour was utterly abhorrent.
I think people forget that Kate herself started the scandal, when she read a negative (but fair and accurate) review someone left online, and threw a tantrum on Twitter about it, lying through her teeth that the reviewer had faked all the extracts quoted in the review and that she was the victim of some kind of malicious vendetta. I remember her tweeting something like "I am extremely frightened" which is a pretty awful thing to say in response to black women critiquing your work. If Kate hadn't kicked off on Twitter none of this would have happened, since no one even noticed or would have paid attention to some random online review.
The publishing world and book Twitter was hugely on her side to begin with and she had a tremendous amount of support, including very influential and famous authors with huge Twitter followings, until a few people actually bothered to fact check and read the book for themselves, and realised that Kate had lied and that all the quotes she'd claimed were faked were indeed in the book.
Even then she was not "cancelled." She signed a new book deal with a new publisher, re-released the book, and got an enormous PR boost off the scandal that she herself created! I can't count how many magazines and newspapers and TV shows she was interviewed in complaining about being cancelled. Honestly she deserves the Laurence Fox Award for "highest number of media appearances complaining about being cancelled."
Several black women who'd critiqued the book and fact checked it on Twitter got a ton of online abuse and iirc even had people calling up their workplaces to complain, because of Kate lying that they'd faked quotes and saying she was scared of them. That's actual cancel culture!
I actually read the book and can't believe it got published without major editing. Everyone has fixated on one or two comments about non-white students and is acting like all this fuss is just because she said "skin like chocolate" once, but the whole book is stuffed with dozens and dozens of sentences that are at best ill-judged. For example the book has quite a few inappropriate comments about underage girls' bodies (referring to pubescent girls as "lithe" and "bosomy" and having "fresh mouths"); there's a a ton of fat shaming; one very poorly judged paragraph about a student of hers who was raped, including inappropriate and judgemental comments about the raped child's body; and the repeated sneering about white children and especially white working class children (calling them "drearily mediocre" and "feral", mocking their chavvy names, and saying she'd happily "slap a Burka" on them to cover up their rotting teeth and bulging double chins) are just vile. Accusing a child of lying when he claims not to be Jewish because he's got a big nose is obviously antisemitic, and why would you accuse one of your own former pupils of being a liar in print anyway?