Database

db={"Board":[{"_id":"62fa5aa25778ec97bc6ee231","user":"62f0eb5ebebd0f236abcaf9d","name":"Marketing Plan","columns":[{"name":"todo","_id":"62fa5aa25778ec97bc6ee233","tasks":[{"title":"Task Four testing 2","description":"This is task four","subtasks":[{"name":"wash dshes test","completed":false,"_id":"62ff74bfe80b11ade2d34456"},{"name":"do homework","completed":false,"_id":"62ff74bfe80b11ade2d34457"}],"_id":"62ff74bfe80b11ade2d34455"}]},{"name":"doing","_id":"62fa5aa25778ec97bc6ee234","tasks":[]},{"name":"done","_id":"62fa5aa25778ec97bc6ee235","tasks":[]}],"__v":0}]}

Query

db.Board.aggregate([{$match:{"columns.tasks._id":"62ff74bfe80b11ade2d34455"}},{"$unwind":"$columns"},{$match:{"columns.tasks._id":"62ff74bfe80b11ade2d34455"}},{"$project":{"task":{"$first":{"$filter":{"input":"$columns.tasks","cond":{"$eq":["$$this._id","62ff74bfe80b11ade2d34455"]}}}}}},{"$replaceWith":"$task"}])

Result