[{"p":{"s":{"status":"b"},"m":{"pd":{"tt":{"bi":"2","psi":"4","ircsi":true}},"mi":"TT","et":"2020-09-07T14:34:00+03:00"}}},{"p":{"s":{"status":"b"},"m":{"pd":{"tt":{"bi":"20","psi":"1","ircsi":true}},"mi":"TT","et":"2020-12-29T08:28:06+03:00"}}}]

db.collection.aggregate([{"$project":{"bi":"$p.m.pd.tt.bi","psi":"$p.m.pd.tt.psi","ircsi":"$p.m.pd.tt.ircsi","mi":"$p.m.mi","status":"$p.s.status","et":"$p.m.et","_id":0}}])