My thinking is that the report was released now because there is a risk that she could have another child or somehow become a caregiver for another child and abuse/neglect or kill that child.
When she was in jail, there was no point in dedicating scarce staff time to completing and releasing a report. She obviously couldn't harm another child while she was incarcerated.
Now that's changed. She could potentially put another child in danger. Since her location is unknown, it makes sense to release the report to make other child protection agencies aware of the situation so they will respond if they learn of her again being in a position where she might put a child at risk.
There was a case where I live of a young mother whose baby died. She was charged, but the charges were dropped after the preliminary hearing because they did not feel there was enough clear evidence to get a conviction. But the child protection report verified neglect/abuse. The next time she got pregnant, that report became evidence that was used to get a court order to have her child taken into foster care as soon as it was born.
Tink