My experience during more than forty years of teaching was that in the last twenty years or so, parents expect more and more things to be taught by school or nursery school.
I have had to tie shoelaces and teach children to do so, help little boys undo their trousers when they needed to wee, (a risky business these days!)) help children blow their noses and remind them to go to the toilet in time.
Formerly, these skills had been learned before children started school.
Table manners should likewise be learned at home, not at school, although children eating a school should be supervised and reminded to eat properly.
Either the coming generation of school teachers will have to accept that it is now their job to toilet train children, teach them to button their coats and eat nicely along with a vast number of other things, or they will have to inform parents that these things have to be taught and learned in the home before school starts.