Hey there, @jlk2021. 

Thanks for chiming in on this thread and letting us know that you're having the same issue but in QuickBooks Desktop for Mac 2021. 

QuickBooks tries to match transactions you download with similar entries in your register. To make a match, the check number, amount, date, and payee name must be similar with the transaction in QuickBooks. If you can’t make a match, the transaction might be new, reconciled, or the info doesn’t match. 

If this doesn't answer your question, can you please provide me with some additional information or screenshots of the unmatched transactions? This will allow me to see why this may be happening to you and your business. 

For future reference, cruise on over to this guide: Add and match transactions in QuickBooks Desktop for Mac. 

I'll be here if you have follow-up concerns about this or should you need anything else. Have a wonderful day ahead!