I can’t speak for the whole of Europe but here in Malta uniform is worn at all schools whether state, private or Church.
My granddaughter is at school in the USA and I think they look scruffy wearing anything they like, although there are still rules about skimpy tops etc.
We always wore uniform as did my own children, definitely no mini skirts allowed, our skirts had to touch the floor when we knelt down.
Getting pet hairs off furniture carpet etc,



