To confirm, are you looking to generate invoices which reflect the dealer’s currencies? So instead of showing the order total in the store’s currency, you’d like it so that the order total appears in the local currency of the dealer’s?
This is possible to do by creating draft orders, as explained in this help guide. But again, the store will need to be using Shopify Payments to enable the local currency feature of Shopify Markets.
Can you verify if the store has Shopify Payments enabled?