Hi there, Marri. The option to restore the Desktop View button is not available. Please note that this feature is only accessible to Accountant and Intuit Enterprise Suite users.
The Desktop View button is no longer available in QuickBooks Online. All users are being transitioned to the new interface to provide a more streamlined and updated experience.
If you're using an Accountant or Intuit Enterprise Suite account, you can download the desktop app by going to the Gear icon.

If you have other questions, feel free to comment them below.