Resource type 'Technician' having Resource role as 'Field Resource' is not visible in dropdown

I have created a Resource type 'Technician' having Resource role as 'Field Resource' and associated resource role as 'Fusion Field Service Mobile Worker', even though it is active it is not showing in the dropdown in the Fusion Field Service when we create the resources. Please help out here on why the resource type is not being shown.

Resource type - Technician

Resource type having resource role - Field Resource is not being shown.