You want it displayed as “yyyy/mm/dd” so it’s actually “[RTL]dd/mm/yyyy”

RTL invert characters are just for rendering purposes it doesn’t help with sorting also in older systems sometimes it was not supported.

In Arabic we use DD/MM/YYYY but it actually gets written as YYYY/MM/DD since Arabic is written and read from right to left. When the year is dropped the confusing part is not what format is used here but rather does this website/software support RTL or is it just regular unformatted ASCII.

Edit: it’s still not ISO 8601 and it doesn’t solve the sorting issue