Hello there, @lily_l_x. When transactions are not appearing in QuickBooks Solopreneur, you may need to manually refresh the connection to ensure they show up. To do this, navigate to the Bank Transactions tab and refresh the feed.
Click the Refresh button located beside the New Transactions section.

I also recommend checking the bank connection in QuickBooks to confirm it is properly linked. Additionally, verify with your bank if there are any ongoing maintenance tasks.
If no issues are found with your bank and the connection appears fine, you can manually import the missing transactions into QuickBooks to keep your records accurate.
If you have any further questions or need assistance with QuickBooks, feel free to click the Reply button.