AWS Javascript SDK PersonalizeRuntime getPersonalizedRanking does not return scores

I was able to print out the scores for GetPersonalizedRanking with AWS SDK JavaScript version 2.1404.0 and Node version 20.3.1, I ran the code below in my local environment:

const AWS = require('aws-sdk')

AWS.config.update({
  accessKeyId: 'INSERT-ACCESS-KEY',
  secretAccessKey: 'INSERT-SECRET-KEY',
  region: "us-east-1"
})

const personalize = new AWS.PersonalizeRuntime();

var params = {
  campaignArn: "arn:aws:personalize:us-east-1:account:campaign/example-campaign-name",
  inputList: ['257', '201', '495', '399', '184', '919', '222', '227', '450', '151', '373', '380'],
  userId: '2', 
  context: {} 
};

personalize.getPersonalizedRanking(params, (err,data) => {
  if(err){
    console.log(err);
  }else{
    console.log(JSON.stringify(data.personalizedRanking));
    const rankedItems = data.personalizedRanking.map  ((item) => item.itemId);
    console.log("OUTPUT " + rankedItems);
  }
});

I then received an output with the scores, below is an example:

{
    "itemId": "495",
    "score": 0.988938,
    "promotionName": null
}

I suggest checking the SDK and Node versions that you are using and try the versions I have used here to see if the scores will appear in the output. But should you still face an issue of scores being excluded in the response, then I would suggest raising a case with AWS Premium Support [1] for further troubleshooting to understand why the scores are not being passed.

I hope this helps.

Reference:

[1] https://aws.amazon.com/premiumsupport/faqs/