the input type of the Yahoo field is not URL, it's type is text, so it cannot be clickable.
I suggest you check out wpForo User Custom Fields add-on. It has all the necessary functions and features for managing User Profile page fields. It also includes form builder tools for a Registration form, Account Settings, etc.
In case you want to say thank you !)
We'd really appreciate and be thankful if you leave a good review on plugin page. This is the best way to say thank you to this project and support team.