HIGH
Source
CloudSploit
ID
sql-cmk-encryption

SQL CMK Encryption

Ensure that Cloud SQL instances are encrypted using Customer Managed Keys (CMKs).

By default, your Google Cloud SQL instances are encrypted using Google-managed keys. To have a better control over the encryption process of your Cloud SQL instances you can use Customer-Managed Keys (CMKs).

Ensure that all Google Cloud SQL instances have desired encryption level.