No. They're the sort of school story novels that he hated for normalizing the abuses of UK boarding schools. Slapping a coat of magic over a genre he hated, where the same boarding school abuses he criticized are treated as magical positives, would have gotten a sharp critique. https://twitter.com/propheticimagin/status/1313247320939532290

Dude hated Walt Disney for ruining every fairy tale he ever touched, he wouldn't have had good things to say about JK Rowling.

One of the reasons CS Lewis was miserable in boarding school was because he didn't fit in with the sports culture, so it's not like he would identify much with a world where a super arbitrary magical sport like quidditch plays such a big role.