It seems reductionist to say Amazon primarily wraps around open source. What about EC2? S3? Glue? DynamoDB? Many of the services that provide the most value are services Amazon has built out.
Om top of these, many of the core services that AWS themselves rely on, like SQS, SNS, Kinesis, Lambda, Cloudfront, ECS, Fargate, Elastic Beanstalk are mostly homemade
