Database
[{id:1,type:"A",date:"2022-01-01"},{id:2,type:"A",date:"2022-01-02"},{id:3,type:"B",date:"2022-01-01"}]
Query
db.collection.aggregate([{$group:{_id:"$type",root:{$first:"$$ROOT"}}},{$replaceRoot:{newRoot:"$root"}}])