push nested loop async await mongodb

//Import ObjectId method
ObjectId = require('mongodb').ObjectID;

//Get a promise from DB
const getCollectionItem = (Collection, id) => {
    return Collection.find({_id:ObjectId(id)});
}

//Iterate over a list of items to store them in a final list
const forLoopPromisses = async (Collection, idList) => {
    let finalList = [];

    for (let index = 0; index < idList.length; index++) {
        const id = idList[index];
        //store the promise
        const promss = await getCollectionItem(id);
        //you can push promss to a list or do whatever to it next
      	//Useful to do conditional updates & deletions
        //Useful to do what u can't through mongodb aggregate
        finalList.push(promss);
    }
    return finalList;
}