AWS Firewall Manager is now available in Canada (Central), Asia Pacific (Mumbai), South America (Sao Paulo), EU (Paris) and EU (Stockholm), extending the total to 16 AWS Regions and all Amazon CloudFront edge locations.

from Recent Announcements: https://aws.amazon.com/about-aws/whats-new/2019/11/aws-firewall-manager-is-now-available-in-5-additional-aws-regions/