Help finding a monster movie

So I watched this on HBO a few times but I can’t find it at all now. I watched it maybe 5 years ago? It’s about this kid (I think a boy) who is sort of friends with this big dark monster thing. I also remember shooting happening in the movie, and the movie was in some Asian language. Maybe Bengali or something. I really want to watch it again, help!

Could it have been Okja (2017)