magento2 – Change the name of the currency in currency selector in LUMA theme

I am triying to do the solution in the link below

How to rename currency name?

I am using Magento 2.4 but i cant find the files, my directory is empty

app/design/frontend/{vendore}/{theme}/Magento_Directory/templates/currency.phtml

I changed the USD symbol to REF but the currency selector did not.

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