I have no idea which section this post goes to but here goes.
Does the other shrimp eat the other shrimp's babies? I'm worried they are like guppies who eat their own children
Any fish will eat shrimplets if they fit in its mouth, but TBH, it is unlikely that they would eat any, and highly unlikely that they would eat enough for you to notice. I got 3 shrimp about 4 months ago and put them in a tank with Trigonostigma hengeli (copper harlequins) and now have over 100. Boraras brigittae are a lot smaller than the harlequins, so I very much doubt that they'd eat many if any.
As long as you have a lot of plants and especially moss I've found that the fish stay at the top of the tank and the shrimplets stay at the bottom until they are big enough not to get eaten.