@RoseField1 is talking sense. Social services is not "The police for women you think are freaks" - at least, it shouldn't be. Social services for child protection are "is this child in danger, do we need to intervene". The threshold for state involvement in child protection is correctly very high. Families have to consent to support most of the time.
Yes, there's can be something icky about fetishising pregnancy, and the kind of sex-work BB does is based on shock value and seeming very risky and extreme. However, she's definitely spoken before about making sure people have STI checks before she actually works with them, and unlike a less-famous porn star/sex-worker, she has a lot of power and control to say no to anything she does not consent to.
Yes, it feels very contradictory to motherhood. However, as RoseField pointed out, as long as the STI risks are being controlled, the baby is relatively safe and is not actually being involved in what BB is up to, because it's not yet born.
Yes, social services can get involved at a pre-birth stage. If someone is using drugs, or is in a domestically abusive relationship, this will affect their body and the health of their unborn baby due to the chemicals and stress hormones and risk of injury to the baby. Consensual sex, even weird sex, is not going to have the same negative impact on the baby as mother is not feeling fear and trauma or being injured, even if you feel like she (BB) is being harmed.
Yes, social services can judge someone's ability to parent based on actions that are not parenting. Taking part in legal but freaky sex work is not necessarily going to impact on BB's parenting - she's not a parent yet, she's a mother-to-be, and the baby is not yet born.
Also these mentions of social services "radar" are laughable. Social services receive referrals, and act on those referrals. There's no "radar". Individual social workers might think "that sounds a bit dodgy" but short of people actually referring BB to her local council (wherever she lives...isn't she Australian?) and them deciding "yes, this meets the risk of harm enough for us to enquire further", there is no radar at all or action that would be taken.
Social workers are not waiting in the wings to scoop up all children born to weird or icky mothers, even if you think she's morally corrupt and perverted. It would be disproportionate even if they had the resources to do this.
Finally, maybe the child will be impacted by their mother being in porn. However, those of you saying this baby should be removed at birth because their extremely wealthy and famous mother worked through pregnancy in sex work; you'd have to make the argument to a judge that the child would have such an extremely dangerous and hard life (or is already having one, but as we noted above it's not actually experiencing very much of anything currently), that being removed from their birth parent is the only rational response from the state. It's a pretty high bar. We don't know how she will actually parent, and there's a duty to preserve families unless there is very high risks of actual harms.