This is what school uniform is for. The clue is in the name:- uniform. Everyone the same regardless of parental wealth.
As a teacher I loathed mufti days. They highlighted the rich kids and made many children miserable. Parents were pressurised into buying things they couldn’t afford to save face for their kids when the deal was that they had already bought the expensive uniform. The discipline was always extremely difficult to maintain all day when the pupils were in their own fashion gear. Many, especially, girls, wore very inappropriate clothing for learning. The face of one kid who always forgot and wore uniform was excruciating.
I have nothing to say in favour of anything but practical, boring, sensible uniform appropriate for learning and a good, non fashion, uniform warm coat for keeping the cold and rain out. In fact, I would say it is the basis of a good school.