The tabloids haven't found him yet!
It seems that they have, and the boy's Dad is "serving a long prison sentence". (The other details of the story all match closely, so I think it's a good bet that it's the same boy.)
Now, this is indeed nothing for Dad to be proud of, but I think it's probably a good enough reason for the judge not expressing the same level of disappointment that he didn't turn up in court for the hearing as she did for his Mum.
Also, we do not have access to the full transcript of what the judge said. Maybe she also went into extensive detail about the kid's background, about Dad in particular, maybe about the tendency of men are in general, with their propensity to commit crimes that attract prison sentences. But the only report we have is that the judge said something about the Mum; it does not say that she did not also talk about the Dad.
Indeed, the news outlet whose output led to this thread may well have decided that further detail would not produce sufficient clicks, shares, and outrage, whereas "Mum bunks off to Ibiza" is a very tempting target. "Man bites dog" will always trump "Dog bites man". So it might well be that the judge did a thoroughly professional job, and that the apparent imbalance in coverage results from the business-driven decisions of the author and editors at iNews.