It clearly states that it is based purely on “witness testimonies” using sources such as ZAKA, the people who spread the stabbing lies to begin with.
It also states that after checking all israeli evidence, there is no forensic or media evidence of any rape happening. And that a real UN investigation would need to take place to draw any conclusions about rape.
The reason it debunks there lies of stabbed pregnant women is of course because there is no evidence for it just like the rape allegations.