My DD is 4.5yo. She can dress and undress herself. I know this because she does so for PE at school.
At home I can occasionally get her to focus and be helpful long enough to take her tights or knickers off, or occasionally put her nightie on. But most mornings (in a rush to get to work/school) I end up trying to get her dressed whilst she wanders off, stares out the window, tries to reach toys etc. She makes very little effort to help and tbh my nearly 2yo makes more effort - helping to pull trousers up, arms out for t-shirt etc. DD however, just waits for her slave (me!) to dress her!
I feel like she should be able to get herself ready on her own at this age, as I know she is capable. I want to have a bit of a crackdown on getting her to be a bit more helpful in the morning, but it is hard when we have to be up and out so early.
When did your DCs start getting dressed on their own?