Just to defend the US a little, when filing you would usually put folders in order by month or year first, not the day, unless you make a lot of subfolders. Year month day in a computer everything will line up in chronological order.
Day first is good for writing out a date like 5 May 23, because you don’t need commas to separate numbers.
I use the US way even though I mostly interact with people from outside of the US, because my boss prefers it, but also because if I switch it and it’s coming from the US it might be more confusing. We also use commas and periods the US way for numbers and money.
I did use day month year engraved in my wedding bands and my husband was annoyed by it. Lol. I chose that because they were made in Italy.