“So apparently, the term “no way to identify them” has some different meaning in these threads”
If that is the term that was used by someone, I agree with you, it is not true.
Some of these children may have been positively identified during the execution of the search warrants. Maybe even proof of who their mother is.
That does not, however, prove they were not subject to abuse.
Easier to argue questions not raised for which the answers are easily known, then discuss the topic.