QB Issue Resolution:

Currently we’re unable to customize the Dashboard menu and add the reports you want. I’d recommend letting our Product Development Team know about this. Your suggestion will be put into consideration for future products updates. You can click the Gear icon in the upper-right corner and select Feedback.

Resolution for Issue 'How do I add a report to the Dashboard?' available: Yes (Solved).
Source: Intuit Community forum.

How do I add a report to the Dashboard?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for dashboard
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