All code are beautifully written. You can customize easily. Just look the amex/baic-form.html file go to form code with change and use.you would like to edit a specific section of the site, simply find the appropriate label in the and change what you need.

amex bootstrap 4 admin dashboard provide this beautifull with standard input-forms you can see this documentation

Basic form

This is some placeholder block-level help text for the above input. It's a bit lighter and easily wraps to a new line.

Input form

HTML5 input form

HTML5 input form