Via curiosity killed the eccentric yoruba, via Dark Matters:
TU BOOKS, an imprint of LEE & LOW BOOKS, publishes speculative fiction for children and young adults featuring diverse characters and settings. Our focus is on well-told, exciting, adventurous fantasy, science fiction, and mystery novels featuring people of color set in worlds inspired by non-Western folklore or culture.
We are looking specifically for stories for both middle grade (ages 8-12) and young adult (ages 12-18) readers.
Details, resources, and examples of what they’re looking for at the link.