Promise not working in JS worker

import {GetObjectCommand, ListObjectsV2Command, ListObjectsV2CommandOutput, S3Client} from "@aws-sdk/client-s3";

// Create client
const S3: S3Client = new S3Client({
    region: "auto",
    endpoint: `https://${accountid}.r2.cloudflarestorage.com`,
    credentials: {
        accessKeyId: env.AWS_ACCESS_KEY_ID,
        secretAccessKey: env.AWS_SECRET_ACCESS_KEY,
    },
});

import {GetObjectCommand, ListObjectsV2Command, ListObjectsV2CommandOutput, S3Client} from "@aws-sdk/client-s3";

// Create client
const S3: S3Client = new S3Client({
    region: "auto",
    endpoint: `https://${accountid}.r2.cloudflarestorage.com`,
    credentials: {
        accessKeyId: env.AWS_ACCESS_KEY_ID,
        secretAccessKey: env.AWS_SECRET_ACCESS_KEY,
    },
});

const item: ListObjectsV2CommandOutput = await S3.send(new ListObjectsV2Command({Bucket: 'pics'}));
item.Contents.map((item) => {
    console.log(item.Key);})

const item: ListObjectsV2CommandOutput = await S3.send(new ListObjectsV2Command({Bucket: 'pics'}));
item.Contents.map((item) => {
    console.log(item.Key);})

S3.send(
    new ListObjectsV2Command({Bucket: 'pics'})
).then((item) => {
    console.log(item.Contents[0].Key)});

S3.send(
    new ListObjectsV2Command({Bucket: 'pics'})
).then((item) => {
    console.log(item.Contents[0].Key)});