One of the main reasons AWS is the leading cloud provider is that it offers a massive number of services that DevOps engineers can use. These include compute (EC2), serverless (Lambda, Kubernetes), storage (S3), databases (RDS, DynamoDB, Redshift), security (IAM, GuardDuty), networking (CloudFront, Route 53), CI/CD (CloudFormation, CodePipeline), and more, providing a comprehensive set of tools for businesses to build, deploy, and manage their applications and services. Any imaginable product can be built using only AWS services, which makes development simpler.
AWS services also offer a great and consistent API with good documentation, which helps developers navigate and find what they need quickly. They also provide SDKs in all of the most common programming languages (Python, JavaScript, C++, etc.), making it straightforward to integrate with them.