Yes, we know about that and stopped it as fast as we realised there was an issue. Anything else to add?
If by "we" you mean the authorities, then we very much did not "stop it as soon as we realised there was an issue".
Girls went to the police and were dismissed as working class slags not worth listening to. Teenagers were charged as madams and prostitutes, with no-one seeming to care that they were below the age of consent, and at the very least, statutory rape had been committed. Healthcare and community workers raised the alarm, only to have their reports buried for years. A 13 year old girl with special needs was referred for an abortion, and no-one cared to look too deeply into the married man three times her age who had impregnated her.
When journalists tried to break the story, they were accused of fueling racial tensions. Pretty much every mainstream media outlet which reported on the grooming gangs initially downplayed the extent of the scandal, and anyone who pushed for clarity on the fact that the perpetrators were majority Pakistani Muslim men, and the fact that this was relevant to their offending, was accused of being racist and faced heavy pressure to shut up about it.
Attempts were made to portray the gangs as a Rotherham-only problem, confined to a couple of years in the early 2000s. Victims in other towns and time periods had to fight to be acknowledged. Just look at footage of Sadiq Khan trying to fob off journalists who called for an inquiry into gangs in London. It'll make your blood boil how dismissive he is, even though at this point, the number of gangs uncovered in major towns and cities across the country, would tell you it's just common sense to look into the possibility of gangs operating in the capital. He knows he's going to find out this was happening under his watch, and doesn't want the bad PR, so he's spent years fobbing off calls for an investigation, and belittling the (usually female) journalists who confront him on the issue. He's not stopping anything as fast as he can. He's being deliberately obstructive - and he's doing so as the Muslim Mayor of London, with the eyes of the world upon him. If he's not feeling the pressure to do justice, imagine how the rest of the political class are acting. He won't be the only one trying to sweep it all under the rug.
Women and girls have been trying to get justice for this for decades. Their bereaved parents, and the children of their assaults, have been trying to get justice. For years and years and years.
Sorry, but it's absolutely unbelievable that anyone would frame the grooming gangs as something that was swiftly nipped in the bud, all sorted out now, nothing left to see. It's very much not the case.