I know what's happening, usermodernmedicinemo.
When you first connect your bank account to QBO, the system can download up to 90 days worth of bank transactions. Some banks allow more than that.
We can bring in your January and other months transactions to QuickBooks Online by using a CSV file from your bank. Here are the articles that we can use for reference:
Once you've imported the file successfully, you can already categorize the transactions.
We'll be right here if you have additional queries about this. Have a great day!