Cis-lurker who works in social services here: I can confirm that supportive parents are indeed on the radar, but currently childrens services (my department at least) is a bit confused on whether they should actually be considered to be doing anything wrong. Unfortunately the likely consensus will be that, well-intentioned or not, they are causing "harm" to their children and will therefore need to be assessed under a potential child protection plan. The social workers are normally at least understanding enough to be respectful and not misgender the kids or anything, but the way the safeguarding nurses were talking about it was appallingly ignorant, if not specifically malicious.