I want to believe
The link for mandatory security rules links to rules for IAM, not networking.
https://docs.oracle.com/en-us/iaas/Content/Network/Concepts/networksecuritygroups.htm
But, apparently there are mandatory IAM policies, and the linked document skips the actual GUI procedure:
https://docs.oracle.com/en-us/iaas/mysql-database/doc/iam-policies.html
This was linked in the DB creation docs, and skips the necessary novice information.
https://docs.oracle.com/en-us/iaas/mysql-database/doc/mandatory-policies-and-permissions.html
This utterly failed when I tried to create a deployment of Nextcloud. Possibly it had to do with the template being from 2021, with Nextcloud version 23.
Could I host a domain minus email?
https://docs.oracle.com/en/learn/oci_nextcloud_ampere_a1/index.html