AWS Firewall Manager now supports organizational units for policy scoping
AWS Firewall Manager now supports organizational units (OU), allowing customers greater flexibility while scoping their policies. AWS Firewall Manager is a security management service which allows you to centrally configure and manage firewall rules across your accounts and applications in AWS Organization. With Firewall Manager, you can manage AWS WAF, AWS Shield Advanced, or VPC security groups across your entire AWS Organization.
Source:: Amazon AWS