Not receiving SMS when sending it through SNS in lambda - amazon-web-services

Question

I am sending the OTP using AWS SNS service when in a lambda function my code is this
const otp = generateOTP();
const message = `Your XXXX Verification Code is ${otp} .`;
var params = {
Message: message,
PhoneNumber: "+91xxxxxxxxxx",
};
AWS.config.update({region: 'ap-south-1'});
var publishTextPromise = new AWS.SNS({apiVersion: '2022-04-01'}).publish(params).promise();
return new Promise((resolve, reject) => {
publishTextPromise.then((data) => {
console.log("MessageID is " + data.MessageId);
const response = {
statusCode: 200,
headers: {
"Content-Type": "application/json"
},
body: JSON.stringify(data)
};
console.log('Server response function');
resolve(response);
}).catch((error) => { reject(Error(error)); });
});
and i am getting this response when invoking this lambda function
Server response function
{
"statusCode": 200,
"headers": {
"Content-Type": "application/json"
},
"body": {
"ResponseMetadata": {
"RequestId": "29796d67-f32e-5e42-a761-37a72809164d"
},
"MessageId": "2f8ffee0-7e0d-5cd3-a5b0-a420a52a14dc"
}
}
But I am not receiving the SMS on that number I don't know what is the problem here cause the I am getting resolved response in the console which means the SMS is send but I am not received it.
Do I have to config the sns manual in aws sns mobile -> text messaging or something??
or is their any other way to send verification otp ?