Thanks for writing to us. Can you please elaborate more on this email confirmation field feature/requirement? It will be very helpful if you elaborate on this.
In some forms, there is a field to enable confirming emails to make sure they don’t misspell. it will check if both fields have the same email address without any spelling error. here is an example: https://ibb.co/kKSS8xx
You can achieve it by putting the below filter code in your active theme functions.php file and adding an extra Email field naming Name Attributeemail_1 as I image attached from Advance Option ,