Is it a good practice to annotate beans inside a custom library with @Component or @Service in Spring Boot?

Question

I am creating a Spring Boot library which can be used for my main projects. Is it not a good practice to annotate beans inside a custom library with @Component or @Service in Spring Boot? If so, why?

Because I saw an article saying,

Do not annotate each of your beans inside a library with @Component or @Service, but define them in an auto-configured module.

But I have 2 classes which I annotated as @Service and inside those 2 classes they have some beans configured as follows,

@Service
public class SomeClass {

private @Autowired SomeClient client;

@Bean
public SomeClient client(@Value("${some.param}) String key) {
   return new SomeClient(key);
}

public void use() {
   // use the @Autowired client and do a task
}
}

When I used this library as a dependency in my main project it is working fine. But I need to know what is the best practice since that article says not to do this. But if I have to configure these inside AutoConfiguration class it's tedious. So can anyone guide me to the correct path? Thank you.