Ingest Pipeline location

Sorry if this should be in Kibana but I am looking to restore an earlier version of an ingest pipeline to compare it to the current but I cannot seem to figure out where it would have been stored. Are they kept in an index?

They are stored in indices, yes. But unless you have a backup you won't be able to compare them.

I have snapshots going back prior to the update. Do you know which index I need to be looking at?