Custom Create Many method not saving relations

Hi, I am trying to bulk insert with api endpoint and I created custom createMany method for this.

Operator Station Stat table has relations. When I send data like that place and operator ids are not saved. (other fields are saved)

(Place and Operator have those ids). Do you have any idea about that ? Note: When I send request to single create method with using this payload, place and operators are saved.
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