can i insert multiple rows with different number of columns/fields in mongodb?

Question

this is the schema that i want to be flexible :

const mongoose = require("mongoose");
const { Schema } = mongoose;
const schema = new Schema(
  {
    //something goes here
  },
  {
    timestamps: true,
  }
);

const newModel =  mongoose.model("Trash", schema);

Now suppose this the trick that I want to do

newModel.create({
    name: "name1",
    age: 24
})

newModel.create({
    name: "name1",
    age: 24,
    address: "address",
    phone: 425565634
})

//and more....