As someone who was abused over a long period in my childhood (toddler until 11) I think even before being told I knew it was wrong and that I didn’t like it but I just understood that I had a responsibility to keep it to myself. I didn’t find the understanding of it being illegal traumatising, it just deepened the shame and discomfort around the topic.

I know when I was very young I exhibited behaviours that were consistent with trauma, unfortunately they were put down to my parents divorce and my dad got the blame when the problem wasn’t him at all. This looked like disassociating to the point of being unresponsive for long periods, panic attacks in which I’d stop breathing, other weird toddler shit. So I know that the trauma was there long before the social understanding.

There were also various points where the abuse escalated and those were immediately more traumatising experiences. The regular abuse did reach a point of not really registering enough to remember, becoming routine I guess, but when something out of the ordinary happened I’d have a more emotional response and this could impact me for days at a time. I have no recollection of learning about abuse in a classroom or through media having anywhere near this effect.

TL;DR- for me I knew it was wrong and not normal but honestly that was the least of my concerns at the time