at the moment it is not possible to manage the test sets through Azure DevOps. We might come up with an option in future releases but at the moment, Test Sets need to be managed and executed in Orchestrator.
In addition, the screen shot you posted shows the types you can select to be synchronized to UiPath Test Manager as requirements. Like it is presented here, each object created in Azure DevOps which is of any of those types would be created in Test Manager as a requirements and kept in Sync.
Since you seem to be using Azure DevOps for managing your tests, you can switch them all off and just enable the “Manage Tests with Azure DevOps” option.
This enables you to assign automation to Tests from AD and see the results there as well.
Additional infomration around that can be found in the documentation for the AD Connector: Connecting an Azure DevOps Project