There's also just. So many reasons the prophet hive child might grow up extremely isolated.
For one I think I will make my version of them part robotic. Which already sets them apart physically. But additionally, they might not even have a biological sex because of this, and thus Lova and Robert might raise them gender neutrally. Resulting in them being extremely out of place in any group that holds onto gender roles in any capacity (cough cough the Orthodoxy).
For two, given that I headcanon both Lova and Robert as on the autism spectrum, they're probably also autistic. So all the isolation that comes from THAT as well.
For three, both their parents being extremely famous. For both good and bad reasons. Even if someone they meet reacts well to the above, how could they trust that they're not just tolerating them to get closer to their parents? What if the person even wants to secretly hurt them? They would rather stay safe and avoid people...
There is a bright side though that, since Lova does know they exist, she might be able to introduce them to the other klavigar children. They probably have some similar experiences that they can share in together...