The missing expense transactions in your linked account could be browser-related. The outdated stored cache can affect the performance of the program.
To rectify this, let's access your QuickBooks Online account via a private window. This is a good place to determine if there's an issue with the browser. Here are the keyboard shortcuts:
Safari: Command + Shift + N
Google Chrome: CTRL + Shift + N
Mozilla Firefox or Microsoft Edge: CTRL + Shift + P
Once signed in, check if the transactions show. If it works, let's clear the browser's cache to ensure the program performs efficiently. Otherwise, you can use other supported browsers. They also provide the best and most secure experience with QuickBooks.
If the issue persists, I'd recommend manually downloading the expenses. Here's how: