Difference between Spring Initializr and Maven Repository

I am moving from standalone Java applications to building Spring Boot projects, and I am confused about the mechanical overlap between Spring Initializr (start.spring.io) and the Maven Central Repository (mvnrepository.com). When I use Spring Initializr, I can select dependencies like “Spring Web” or “Lombok,” and they are pre-configured in the downloadable zip file’s pom.xml. However, I can also look up these exact same dependencies directly on the Maven Central Repository and manually paste their XML coordinates into my pom.xml later.