Mongo Playground

Configuration

[{"ID":"61f1244daeaea5f165851fc9","name":"Mulandi","author":"Owayo","description":"dnjsfnvlksfnvls","created_at":"2022-01-26T10:37:01.558Z","Section":[{"ID":"61f557213fd9b086c3a422c5","Title":"Weee","Content":[{"ID":"61f5586e3fd9b086c3a422dc","Subsection_Title":"Idk","Content":"Something"},{"ID":"71f5586e3fd9b086c3a422dc","Subsection_Title":"Idk2","Content":"Something2"}]}],}]

Query

db.collection.aggregate([{"$match":{"name":"Mulandi"}},{"$unwind":"$Section"},{"$unwind":"$Section.Content"},{"$match":{"Section.Content.ID":"61f5586e3fd9b086c3a422dc"}},{"$project":{"Subsection_Title":"$Section.Content.Subsection_Title","Content":"$Section.Content.Content","_id":"$Section.Content.ID"}}])

Result