The nspcc report says that snapchat is top app for child grooming, big tech HAS to do something about this and protect users far more. The EU needs to stand it's ground and make robust laws to force big tech to act, but also perhaps have other laws so that if children or anyone comes to harm, then big tech bosses will be held to account.
We may not be able to arrests, charge, prosecute and jail us citizens at the top, but if the boss of the UK office is a UK/EU citizen we can throw the full weight of the law at them.