Search X allows you to enable currency conversion for all product results.
If you have multiple currencies enabled in your Shopify admin, those currencies will be available for selection by the user if enabled.
We are actively monitoring Shopify's rollout of multi-variant price per currency. As soon as we understand the full documentation and data workflows, we will be implementing it asap as a tier-1 priority. Please contact us for more information about this feature, we would love to learn about your specific use-case and your feedback and communication with Shopify.