I got the same response. They seem to have purposefully removed a very useful easy to understand feature.

"We’re reaching out to you about a recent issue you had with Get things done tab missing from the Dashboard.

We reviewed your case (***********), and found that QuickBooks Online is working as designed. We appreciate you reaching out to us with your concerns, and would like to hear more. Submit your feedback in QuickBooks Online by selecting the Gear icon, then selecting Feedback."