Remove the standard behavior of the Ajax submit and use the Form for a common GET or POST action onto a specific Target page, also external, that will handle all submitted data.
Pro-Form
Extension
![Form Method 6 Conditions Method](https://e-addons.com/wp-content/uploads/2020/07/Conditions_Method.png)
Form Method
Manage submitted data on standard Ajax actions or send them by POST or GET to your custom endpoint.