It's a boy! and it's called "Siddhartha Cardinali", I found it from this site by reading the more detailed plot.
https://www.yukfilm.com/noci-sonanti/
Thirty years later, the film tells of a summer that sixty-five-year-old Fabrizio spends with his little son Siddhartha, who grew up in a tribe when his father and mother were still together. The child prepares with his father for the fourth grade exam, the only institutional moment in his life. During the summer Sid starts dating Sofia, a neighbor who is almost the same age as him. With her he experiences a different lifestyle. Archetypal moments, common to every child, alternate with others more linked to lifestyle, which mark a difference between the tribe and the rest of the world. A difference that the child must consider when he imagines his future for the first time.
Look carefully at this photo, you can tell it's a boy.
[Image]