Hello,
You can achieve this using the built-in Popup Builder feature of the theme.
Please follow this approach:
Create your pop-up and add a form with the fields (Full Name, Mobile Number, Email Address). In the pop-up settings, set the trigger type to “On selector click”.
https://postimg.cc/LgFBhRXg
Then make sure the selector is correctly matched between the menu item and the pop-up settings:
In the Popup trigger settings, use the selector with a dot, for example
.details https://postimg.cc/LgFBhRXg
In the menu item, add the class name in the “CSS Classes (optional)” field without the dot,
https://postimg.cc/8sJPWBq3
This way, when the user clicks that menu item, the pop-up will open correctly.
You can also refer to the documentation for more details:
https://xtemos.com/docs-topic/popup-builder/
Best Regards