I'm trying to make a request using a query, the response can or cannot have an specific parameter, so is there a way to set that parameter as null and still receive the response

Query

query FetchStore {
        storeId
        cartNumber
    }

The storeId will always be received but the cartNumber might not be returned, I'm using the version 2 of apollo so this means I can't use the typePolicies from v3