[{"_id":{"$oid":"612f4e32aa56064f1608c2eb"},"messaging":[{"ourNumber":"+15123568549","messages":[{"contact":"+21629000111","contactedNumberMessages":[{"direction":"out","content":"Hello!","when":{"$date":"2021-09-23T23:00:00.000Z"},"nature":"SMS"},{"direction":"in","content":"Hi!","when":{"$date":"2021-09-23T23:00:00.000Z"},"nature":"SMS"}]}]}]}]

db.collection.aggregate([{$match:{_id:ObjectId("612f4e32aa56064f1608c2eb")}},{$unwind:{path:"$messaging",}},{$unwind:{path:"$messaging.messages",}},{$project:{messaging:{ourNumber:1,messages:{contact:1,contactedNumberMessages:{$filter:{input:"$messaging.messages.contactedNumberMessages",as:"message",cond:{$eq:["$$message.direction","out"]}}}}}}}])