Amazon S3 Transfer Acceleration is a bucket-level feature that enables fast, easy, and secure transfers of files over long distances between your client and an S3 bucket. Transfer Acceleration takes advantage of the globally distributed edge locations in Amazon CloudFront. As the data arrives at an edge location, the data is routed to Amazon S3 over an optimized network path.
Global Accelerator works with: Elastic IPs ALB / NLB (Application/Network Load Balancers) EC2 instances AWS services reachable via IP
S3 is a distributed service, its not one off services like ec2 instances, that's why its physically it required AWS to create two different service