Since September 2025, Variant Option Product Options is compatible with multi-currency checkout.
One issue is if the customer adds a product with one currency and then changes the currency before checking out.
The problem is that our app was designed before it was common for stores to display multiple currencies. The price data can only be recorded to the cart as text and it’s hard to parse that data and find the price value and currency for all currencies.
We are looking into solutions.