Inserting a date from Neo4j into mongodb as date type

I am trying to insert a document into mongodb from Neo4j using apoc, and the document contains a date that I need to be received in mongodb as a date type. Here is an example of what I am sending:

CALL apoc.mongodb.insert('mongodb://localhost:27017','somedb','test',[{runAt: apoc.temporal.format(datetime(), 'ISO_DATE_TIME' )}])

I do receive the document on mongodb, the date is a string, which makes sense (because of apoc.temporal.format) , but I want it to be of type date in mongodb.

I tried almost everything, and I am stuck
Any help is appreciated.