Enable the mapping and select your datasource from the list to make the system automatically add questions from the Dashboard:
Read more on how to set up Survey.

2. Enable Verification in Advanced Settings

3. Select the field
Send out a Campaign with a regular link, do not generate memberlink, for example Phone Verification+Common-NPS

A user will insert the code after they have entered their email or phone, and it will look like this
After a user enters the code, they can see all questions and provide answers.