Hi there. Thanks for reaching out to the Community. I'll be happy to share more info about using PayPal with QuickBooks. At this time, the PayPal feed can only pull in transactions using your base currency. As lashedlifter has stated above, this feature isn't supported yet but I think this would be great feedback for our engineers.
You can leave feedback to our engineers by clicking the Gear icon and looking for Feedback. Let me know if you have other questions. I'm here to help.