Backing up a Schema Registry

Can my schema registry also be backed up?

It depends.

Schemas are stored on a topic (usually on _schemas), so they can also be backed up. However, schema registries on Confluent Cloud are managed on separate Kafka clusters and the _schemas topic is not accessible.

However, we are working on a feature that will allow you to back up your schema registry via the REST API, and to restore/migrate it to a new cluster. See Schema Mapping for more information.