Thanks for posting in the Community @heazim1. I'm here to provide clarification about the Plus icon.
QuickBooks Online has recently updated the software's workflow. The + New button above the left navigation panel serves the role that the Plus icon did.
To learn more about this workflow and other aspects of the update, I recommend this article: What’s new in QuickBooks Online: October 2019.
Should you have questions about this update or any other QuickBooks topic, I'm just a post away. Hope you have a great day.