Sobject Key Result and KPI uses data from Salesforce Object. Any object in Salesforce can be made available in Sobject/KPI using this setting. To add one or more Salesforce Objects, select the required objects and move to the Selected area using the arrow buttons. Click update to save the selection.
Objects can also be removed by removing the objects from the Selected area and click update to save the latest selection.Lead and Opportunity are added as default to Sobject/KPI, if these objects are not required they can be deactivated in Setup-> Custom Metadata Types.