How can we sync dynamodb with datastore in nodejs?

[Ahmedijaz19]

I am using Amplify CLI for datastore. It is working fine. But it is not syncing data with dynamodb. Means Post gets save in datastore local storage but does not go in dynamodb POST table. My code is below

const {syncExpression} = require("aws-amplify")
const {Amplify} = require("aws-amplify")
const Post = require("./models")
const awsconfig = require("./aws-exports")
Amplify.configure(awsconfig.awsmobile)

exports.handler = async (event) => {
    try {
        console.log("inside")
        
        let response=await DataStore.save(
            new Post.Post({
              title: "My second Post",
              status:"DRAFT",
              rating: 7
            })
          );
    
          console.log("Post saved successfully!");
     
        return response;
      } catch (error) {
        console.log("Error saving post", error);
      }

};

This is not storing my data to dynamodb.