The best method for the OP’s requirement (creating an object if it doesn’t exist) is to use Make’s error handling and the Resume module.
For example, you could have something like this:
This scenario tries to create the record in Zoho based on the details in the Google Form. If that record already exists, it throws an error and follows the lower error handler route, finding the object and updating it.
The Resume module tells Make to resume processing after the failed module (in this case, the Create module), using different outputs to replace the outputs of the failed module.