hello
currently, it is not possible to sell products in multiple currencies with Wix Stores, the currency converter is not available on Editor X, but please note it won’t allow receiving different currencies, so it would be only currency display.
At this point, it is a feature request for Wix Stores you can vote for here: https://support.wix.com/en/article/wix-stores-request-selling-in-multiple-currencies