I'll share some steps to get your transactions updated.
QuickBooks Self-Employed downloads the latest available transactions every night. If you’re not getting the latest data or updates seem stuck, please make sure to sign in to your bank’s website. Then, check if there are no maintenance updates or information that needs your attention.
If there's none, we can try to refresh the connection by following these steps:
Go to the Gear > Bank accounts.
Click the Refresh all button.
Here's a sample screenshot for a visual reference: