Hi Leonard,
There are a few options for integration with Survey 123 depending on your configuration. One solution would be to use database triggers or write a script to monitor the feature service or database for changes and either create it as a service on the machine or hook it into windows scheduler to run periodically. If you aren't using portal authentication, you should be able to use a headless user and webhooks to accomplish your goal as well. We are looking at making this integration smoother with our revamp, and if you happen to be at Dev Summit or UC feel free to swing by and chat with us at our booth.
I hope this helps, and let us know if you have any other questions!
Sam