When registering services in the SKUs, the trigger for the product to be sent to the reindexing queue is not fired. Therefore, the service is not applied for the products in question.

1. Access the Catalog module
2. Browse to Products > Products & SKUs > Product and SKU Management
3. In the product listing click the down arrow next to Change, then click SKU
4. In the list that loads after that click on Services
5. Click the New Service button
6. Fill in the data and save the service

To force the reindexation of the product that had services registered in their SKUs, access the product page in the Admin, enter a space in the description of the product and then save it.