MongoDB: How to create an object that has an array of objects as a field?

I have this schema:

const SingleExerciseSchema = new Schema({
    exerciseName: { type: String },
    setLog: [{
        weight: { type: Number },
        sets: { type: Number },
        reps: { type: Number },
    }],
});

Then I get data like this, as a json:

const DATA = [
    { exerciseName: "Squat",
      setLog: [
        {weight: 65, sets: 1, reps: 5},
        {weight: 55, sets: 2, reps: 5},
        {weight: 45, sets: 1, reps: 5},
      ]
    },
    { exerciseName: "Overhead Press",
      setLog: [
        {weight: 27.5, sets: 1, reps: 5}
      ]
    }
  ];

I want to loop over the data and create my SingleExercise objects from it.

Like this:

const exerciseObjectList = (req.body).map(
    (exerciseLog) => new SingleExercise({
      exerciseName: req.body.exerciseName,
      setLog: // stuck here
    })

However, I'm not sure to update/access the setLog fields, syntax wise. I want something like this:

const exerciseObjectList = (req.body).map(
    (exerciseLog) => new SingleExercise({
      exerciseName: req.body.exerciseName,
      setLog: {
        (req.body.setLog).map(
          (set) => {
            weight: set.weight,
            sets: set.sets,
            reps: set.reps,
          }
        )
      }
    })
  );

but it's obviously wrong syntax.

Edit: I actually had a stupid mistake in my code, I wrote req.body.exerciseName instead of exerciseLog.exerciseName in my loop.
Also, I just went with

setLog: exerciseLog.setLog

and it works (instead of accessing each field inside setLog separately).
I still don't know how to access each field separately, but for now, I don't need to do that.

Fixed code:

const exerciseObjectList = (req.body).map(
    (exerciseLog) => new SingleExercise({
      exerciseName: exerciseLog.exerciseName,
      setLog: exerciseLog.setLog,
    }));

I believe you can just map over the req.body and add the element inside each new SingleExercise

const exerciseObjectList = req.body.map(exercise => new SingleExercise(exercise))