Not enabling deletion protection for AWS QLDB Ledger can impact the availability of the data.
Delete protection for QLDB is enabled by default when using Terraform, however the setting can be overridden. For additional security considerations, see the AWS documentation.
In Terraform -
Resources:
https://docs.aws.amazon.com/qldb/latest/developerguide/what-is.html
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/qldb_ledger#deletion_protection