Thanks for reaching out in the Community, lee-irving,
I'm here to provide clarification about matching multi-currency bank transactions.
At this time, the Find match option is unavailable when matching a foreign currency bank account. The Multi-currency option in QuickBooks Online is used to set a specific currency for vendors or customers.
To learn more on how Multi-currency feature helps you manage your business, I'm attaching some helpful articles that you can check:
Should you have questions about this, or anything else, please feel free to visit us again. Have a great day!