CODE EXAMPLE FOR JAVASCRIPT

https://stackoverflow.com/questions/19380738/mongoose-nested-query-on-model-by-field-of-its-referenced-model

const result=await Company.aggregate([
    {$lookup: {
        from: 'persons', 
        localField: 'founder', 
        foreignField: '_id', 
        as: 'founder'}
    },
    {$unwind: {path: '$founder'}},
    {$match: {'founder.lastname': 'Robertson'}}
]);