Custom object filtering with data loaders

[ParadiseFallen]

Hi. i have

record Book{
  [ID<Book>]
  public Guid Id { get; init; }
  public string Title { get; init; }
  [ID<Author>]
  public Guid AuthorId { get; init; }
}

And

record Author {
  [ID<Author>]
  public Guid Id { get; init; }
  public string Name { get; init; }
}

Then i made Extension

[ObjectTypeExtension<Book>]
public static class BookExtension {
  public static async Task<Author> GetAuthor([Parent] Book book, IAuthorByBookIdDataLoader dataLoader, CancellationToken cancellation) => dataLoader.LoadRequiredAsync(book.Id, cancellation);
}

When i have UseFiltering on books resolver HC generates for me BooksFilterInputType. But it does not contains Author.
So how i can extend it to make

books(where: {
  author: {
    name: {
      contains: "example"
    }
  }
}){
  nodes{
    id
  }
}

This is possible while i use EFCore with navigation properties. But if i use smth other (marten as example).
So how i can achive same behaviour?