Change MongoDb ObjectId _id to string in Micronaut using java

Question

I have below Pojo class for the mongo entity

public class Product {
    @BsonProperty("_id")
    @BsonId
    private ObjectId id;
    private String name;
    private float price;
    private String description;
}

when I fetch the mongo result as per the below code

var item = Flowable.fromPublisher(this.repository.getCollection("product", Product.class).find()).blockingIterable();

The id id mapped something like this

However, in the database the id is something like this

How do I map this id in the correct way, I am using Micronaut framework with java 15