Should help https://www.baeldung.com/spring-rest-openapi-documentation

<dependency>
    <groupId>org.springdoc</groupId>
    <artifactId>springdoc-openapi-starter-webflux-ui</artifactId>
    <version>2.8.5</version>
</dependency>
<dependency>
    <groupId>org.springdoc</groupId>
    <artifactId>springdoc-openapi-starter-common</artifactId
    <version>2.8.5</version>
</dependency>