Database
[{"_id":ObjectId("65977bef1ccf990fe33ffc0d"),"email":"yww24@gmail.com"},{"_id":ObjectId("65977bef1ccf990fe33ffc0f"),"email":"iqiyz@gmail.com","phone":"8887774455"},{"_id":ObjectId("65977bef1ccf990fe33ffc10"),"email":"46d9s@gmail.com"},{"_id":ObjectId("65977bef1ccf990fe33ffc0e"),"phone":"6669997744"}]
Query
db.collection.aggregate([{$group:{_id:null,phones:{$addToSet:"$email"},emails:{$addToSet:"$phone"}}},{$set:{data:{$arrayToObject:{$map:{input:{$setUnion:["$emails","$phones"]},in:{k:"$$this",v:1}}}}}},{$replaceWith:"$data"}])