Is this worth reporting or am I overthinking it?

No, I don't think you're overthinking it at all. You should definitely report it. Not taking care of a child's basic hygiene is a form of abuse. And she plans to lie and say her child was touched inappropriately when it actually seems like the teacher is trying to help? That is wrong. Please report it. That baby may not have anyone else who is willing to advocate for her.

Report it. Even if they find nothing from it at least it’s written and documented. If she’s not allowed a hair brush I can’t imagine what else gets taken from her.

This is so sad. She doesn't sound well cared for at all. And at the same time, foster homes can be just as terrible if not worse. I wish ppl had to go through tests before having kids. They are so precious and you never know what goes beyond closed doors...
I would report it and follow through. I just am scared for her and consequences if the services don't help and she is left there as well. As a victim of abuse, it's worrisome.

Report it definitely, this is so cruel 😭poor baby girl

I 100% agree that you should report it!!

My mums a child protection social worker, I’ll screenshot this and see what she says???

Report it to child protection and also tell the school as well. It's a good thing for them to be aware of.

You are definitely not over reacting! Please report it!
Poor kid!

Her basic hygiene needs are clearly not being met if her hair is visibly matted, which is a huge safeguarding concern.

Sounds like the teacher is just trying to help the child and the child is willing as all she wants to to feel normal like the other girls.

Please report it to both school and protection services.

It will help the case of the teacher if the parent does raise a concern as you have witnessed the parent refusing to brush her hair entirely and protection services definitely need to be involved as it sounds like she's been neglected in some ways.

You're potentially the only advocate this child has, please report it.

I'd report it for sure

It’s ok to look into it , if it was me I would first try to stay out of it personally. It could cause more harm than good being we don’t know situation. If you see it keep happening and keep happening then report it

If you don't feel comfortable calling CPS, please tell the school at least. They may be building a case already, and that information could be helpful.