I’m not a parent, but going by pop culture, it seems like literally every child has the same fears.
In pre-modern times, I imagine that they’d be sleeping in the same room as the parents, but if modern notions of privacy don’t permit that, seems we could at least design an enclosed capsule or something.
My 1st thought is that we may need these minor fears to learn how to deal with fear itself and as part of developmemt they’ll likely just be a fraid of something different instead.