If she is not having any difficulties at school, then nothing, really. They will put her on the 'school action plus' list as she is seeing an outside specialist, but if she is not experiencing any difficulties at school, then it's just a paperwork exercise.
A dx just makes getting required support a bit easier, it doesn't come with an automatic list of 'what should happen next', so ultimately it is up to you and the professionals involved to recognise where/ if she needs support, and discuss implementation.
Off the top of my head, if she is struggling its handwriting, the to can suggest some ways the school might support her, either by the use of a particular fine motor or writing programme like write from the start, or by trying pencil grips/ sloped boards. If she is fine and keeping up, this won't be necessary.
All kids are different, but the ot can advise the school how to help if they are struggling to support her in a particular area of need. If an iep is required, the ot can also offer advice on target setting.
Ultimately, it is about dd, not her dx. The dx just makes it more likely that she can access support for her needs. So, what does she need/ struggle with in the school environment?