If you created these services from a service template, you can use the option 'Export Configuration ...' (more information in DataMiner Docs)
The generated CSV file will contain the IDs of all elements included on each service generated by the service template.
If you created the services manually, the only option (out of the box) that I could think of is exporting the service itself to a CSV file. The generated CSV file will contain the IDs from all elements included in the service. The drawback here is that you will need to do it for each service.
Hope it helps!