Seanan McGuire - Where the Drowned Girls Go (2021) ENG

There is another school for children who fall through doors and fall back out again.
It isn't as friendly as Eleanor West's Home for Wayward Children.
And it isn't as safe.

When Eleanor West decided to open her school, her sanctuary, her "Home for Wayward Children," she knew from the beginning that there would be children she couldn’t save; when Cora decides she needs a different direction, a different fate, a different prophecy, Miss West reluctantly agrees to transfer her to the other school, where things are run very differently by Whitethorn, the Headmaster.

She will soon discover that not all doors are welcoming...