db={"Recipe":[{"_id":ObjectId("61404f0023d34b53c8982d47"),"feedBack":[{"_id":ObjectId("615161de8bf6f93620bb41b0"),"review":"good","rating":2,"userId":"884096bf-0a8f-4d89-bcbb-4bbf70fb0198","time":ISODate("2021-09-27T06:17:02.115Z"),"id":"e6ed5d23-0bef-41c9-86e7-c7ecdd015aca","isDelete":true},{"_id":ObjectId("615161e78bf6f93620bb41b4"),"review":"good","rating":4,"userId":"9bc033b8-0592-40e4-8080-21e0038aac12","time":ISODate("2021-09-27T06:17:11.085Z"),"id":"514367e4-1155-4075-a58e-84a158e52288","isDelete":false}]}],"User":[{"_id":ObjectId("61389fa03ac2c73724b4ed8b"),"accountType":"email","name":"daniyal","id":"9bc033b8-0592-40e4-8080-21e0038aac12",}]}

db.Recipe.aggregate([{"$unwind":"$feedBack"},{"$match":{"feedBack.isDelete":false}},{"$lookup":{"from":"User","localField":"feedBack.userId","foreignField":"id","as":"result"}},{"$set":{"result":{"$arrayElemAt":["$result",0]}}},{"$project":{"_id":0,"id":"$feedBack.id","isDelete":"$feedBack.isDelete","rating":"$feedBack.rating","time":"$feedBack.time","review":"$feedBack.review","userName":"$result.name"}}])