Hello,
I believe your use-case can be solved by going one step back in the migration process and modifying your migrateOut command to export only services and policies in a specific folder with the folderName and includeOnlyServicePolicy flags.
i.e. migrateOut --folderName your_folder_name --includeOnlyServicePolicy --dest your_folder_bundle.xml ...
This will export all folder, service and policy entities under that folder, but you can then filter out only the services in the manageMappings command with the --type flag. Since you asked about providing a full list of id's as an argument, I'm going to assume you want to apply the same mapping command to each service under that folder.
Here's an example of changing all services to map by the name of their source entity. This is done by providing the targetName flag with no value
i.e. manageMappings --type SERVICE --targetName --bundle your_folder_bundle.xml
Or another example of mapping all services to a different action like 'Update'
i.e. manageMappings --type SERVICE --action Update --bundle your_folder_bundle.xml
I hope my assumptions were correct and this helps. Please let us know if not.
-Jordan