Maltreatment at School

I’m worried my 4 year old non verbal autistic daughter is being mistreated in school. I just want to premise this by saying that the people my daughter comes into with outside of school is limited. Majority of the time just me and my mom, sometimes her Dad and we do not physically discipline her. Also that although my daughter doesn’t speak, she does find ways to communicate. Lately I’ve noticed she flinches if I raise my hand above her head. I waived it away as reflexes at first then she started doing something new. You know how old school teachers would slap kids hands with rulers? Well my daughter was playing with a hand fan, she comes up to me, puts the fan in my hand, gives me the palm of her hand and with her other hand is forcing me to tap her open palm with the hand fan. I’m thinking okay this is odd. She then makes me drop the fan, makes me ball my hand up so that only my index finger is pointing out, gives me the back of her hand and makes me tap the back of her hand with my finger. Basically like shes re-enacting something. I try to get her to do it again but she runs away. Then tonight she’s sitting in my lap and she does it again. She takes my hand, balls it up so that my pointer finger and finger next to it is out and taps the back of her hand but she wants me increase the force. Then she flips her hand over and does the same to the palm of her hand but forces me to really press fingers into her palm and down her inner wrist. It reminds me of when my Dad used to slap the back of my hand when I was a kid to discipline me. I want to ask her teacher if they’ve been “playing a new game” in class but not sure what else to do besides that…