ACF has options pages https://www.advancedcustomfields.com/resources/options-page/
ACF does not have the ability to add fields to pages created in WP using it’s functions to add admin pages, for example add_options_page() https://codex.wordpress.org/Function_Reference/add_options_page or any of the related functions listed at the bottom of this document.
Styling of ACF can be accomplished by adding custom CSS, there is a short explanation of that here https://www.wpguru.com.au/wordpress-development-tips/add-custom-css-js-advanced-custom-fields-plugin/
