Thank you for posting here in the Community. Let me help you sync the changes with your banking profile in QuickBooks.
You can perform some basic troubleshooting to isolate and fix the issue. I suggest you start by downloading the latest transactions manually in the banking section.
After following the steps above, can you please check if you're getting an error message? If yes, I recommend checking out this link to know more about how to fix bank error messages in QuickBooks: What to do if you see a bank error or bank transactions won’t download.
For additional reference, you can use the following article to upload bank data manually into our system: What to do if you see a bank error or bank transactions won’t download.
Drop me a comment below if you have any other questions. I'll be happy to help you some more.