We appreciate you posting your queries in this forum, Maile. I'll ensure you can connect with the right team to help select ground shipping and add signatures to shipping labels.
Since the shipping label was created through the shipping manager tools in QuickBooks, I recommend contacting ShipEngine support for guidance. They can discuss the ability to select ground shipping and add signatures on your shipping labels, then walk you through the process.
To guide you further with creating shipping labels and managing payment processing for your connected carriers, refer to this article: About QuickBooks Online Shipping Manager.
Moreover, several reports are available to help you get insights into the items you buy and sell or keep track of the status of your inventory. To determine which data best suits your needs, scan this material anytime: Use reports to see your sales and inventory status in QuickBooks Online.
We'll get back to you whenever necessary if you have other questions with the shipping manager in QuickBooks Online. We're always here to provide the help you need in any way.