Does it count?
I (18f) have a few minor experiences that I'm not sure count as SA:
When I was 16, a 14yo boy came up to me and asked for a hug. I thought he was just a kid that was sad or something so I said yes, and then he rubbed his hands all over my back and my sides (over my clothes) and then left
When I was 8-9, there was a girl (also 8-9) at school that would always follow me to the bathroom and climb on top of the toilet lid in the stall next to me and look down at me while I peed. And when there was no free stall next to mine she would get mad at me and watch me through the gap between the door instead. This went on for about a year.
When I was 2-3, my mum (with intentions unrelated to sex) would use her fingers to dig out my poo from inside me. And then when I was 3-4, she had me watch her do the same for my younger brother.