Inability to change Price to default currency at checkout

I have a Bike rental woocommerce website that has Indonesian Rupiah as default language. I am using WPML plugin to allow my visitors to shop in multiple currencies and languages. It is working fine.

I just got Curcy so that I can convert the Final Total order value into Indonesian Rupiah (Default store currency) so that my Payment Gateway Provider can accept the payment request since they deny any payment request made to it’s API using any other currency other than Indonesian Rupiah (IDR).

Can you help with a screenshot or a material I can turn to set this up, please.

Thank you.