I'm working in a store with English and Spanish versions.
In the English store it displays the values correctly, while in Spanish it displays the values zero.
Follow the prints.
Go to Admin > Store > Currency > Currency Rates
and check have you set currency properly or not. You need to set currencies properly then it will reflect.
Kindly follow below link:https://docs.magento.com/user-guide/stores/currency-update.html
It may be root cause.