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You'd want to click the account drop-down menu to see your newly-added credit card account.
Once completed, all the newly downloaded transactions from your credit card will automatically populate.
On the other hand, I've added these articles to help you manage your downloaded transactions:
Assign, categorize, edit, and add your downloaded banking transactions
Let me know if you have other questions about managing your connected bank accounts with QuickBooks. I'll be always here to help.