I'm concerned my data appears scrambled. How do I restore from the most recent online backup?

Welcome to the Community forum, @mlong3.

Data restoration is exclusively available in QuickBooks Online Advanced, and the process will take up to an hour, depending on the amount of data your company has; less data means quicker restoration. During the restoration, avoid using your QuickBooks to ensure a smooth restoration. Once done, a checkmark will appear in the status, indicating it's safe to resume using your company file.

To restore, here's how:

1. Navigate to Settings and choose Back up company. Sign in with your Intuit account and click Authorize to continue if prompted.
2. Locate and select the company file you want to restore.
3. Open the Action dropdown menu and choose Restore.
4. In the Date field, pick the date for the restoration.
5. Use the Time dropdown menu to specify the time for the restoration.
6. Click Next and follow the on-screen instructions.
7. Tick Start Restore to initiate the restoration process.

For more information about the process, check out this article: Back up and restore your QuickBooks Online Advanced Company.

If you're using another QBO subscription plan, please be aware that QuickBooks continuously updates your records with each change and does not support restoring your files to a previous state.

Moreover, QuickBooks offers the capability to export your data, allowing you to keep it readily accessible and easily track it whenever needed.

To help you more with managing your data and any company financial concerns, our QuickBooks Live Expert Assisted team can guide you with dashboards and insights to enhance business effectiveness.

I hope this information has been helpful; please don't hesitate to reach out if you have any further questions. 

RE: My most recent checking account entry is 7/31/23

That sounds like your register is not sorted by date.  If you sort it by date by clicking on the date column's title, either ascending or descending, then do the expected details appear?