My rooster crowed really late so don't always rely on that, and I'm not an expert but from the way it's standing in the first picture it seems like a boy but then again on the others it doesn't, it's chest feathers tell me it's a girl and the wattle i can't tell but a female will have a V shape and a male would have a U shaped wattle. Males have larger feet, thicker legs, and longer hackle feathers than females.
So I am pretty sure that isn't a rooster but just keep an eye out