I think it probably is a male.
It is common for some to crow at different ages than others. He might be slower to mature, or he might be intimidated by some of your hens or by the cockerels he hears from the neighbors.
Or he might be crowing but you don't realize it. Sometimes individual...
They're cute little bantams.
The breed is called d'Uccle, named for the town of Uccle in Belgium, where they originated. The breed comes in several different color varieties.
"Mille Fleur" is French for "thousand flowers," obviously referring to all the little white and black dots. Mille Fleur...
The chick has some white feathers in its wings, and will have some white feathers in the tail when it grows up. It has at least one parent with those traits. From your list, that should be a Red Sexlink mother.
Either rooster could have been the father.
I think it looks male because of the...