SNS sending SMS using SDK for JavaScript (v3)

import { SNSClient, PublishCommand } from "@aws-sdk/client-sns";

export const sendSMS = async () => {
    try {
        const sns = new SNSClient({ region: 'Your AWS Region' });
        const params = {
            Message: 'Your OTP Message',
            PhoneNumber: 'To phone number',
        };

        const snsReseult = await sns.send(new PublishCommand(params));
        return snsReseult
    } catch (err) {
        throw err;
    }
}

For further reference , please look in to this AWS Docs