Bakemono no Ko, Tenki no Ko Recommendations
Addresses similar themes concerning found families, runaways, and fantasy elements, but does it with a stronger attention to detail in terms of the story on presentation.
Runaways. Weathering With You and The Boy and The Beast both feature children runaways who end up entwining their lives with some supernatural entity.
Tenki no Ko is Hodaka and his fate with "sunshine girl" Hina. Boy and Beast is about Ren and his time as Kumatetsu disciple. Both Hodaka and Ren find new people along this way to aid them in their objectives too.
Both are good fantasy anime movies with great visuals, though Tenki no Ko features romance compared to a father-son relationship in Boy and Beast.