Portal fantasy stories where real world problems are a major part of the story?

I love how Holly Black's stories have so much discussion of poverty/sexism/other real-world issues as well as travel to fairyland. And I always want more books with that kind of bent. So far I've read & liked: A Spindle Splintered by Alix E Harrow Wayward Children series by Seanan McGuire Where I Can't Follow by [...]