const allFords = await db.collection('mycars').find({manufacture: "Ford"}, {_id:0, model:1}).toArray();

const allFords = await db.collection('mycars').find({manufacture: "Ford"}).project({_id:0, model:1}).toArray();

Language Consistency

Starting in MongoDB 4.4, as part of making find and findAndModify projection consistent with aggregation’s $project stage,

    The find and findAndModify projection can accept aggregation expressions and syntax.
    MongoDB enforces additional restrictions with regards to projections. See Projection Restrictions for details.