Oxygen is a somewhat unique combination of theme template builder and page builder that takes over and replaces the theme. Of all of the plugins in the builder class, Oxygen is one of the most developer focused and includes a code block for custom PHP and a PHP callback function for working with advanced field types. It has a WooCommerce addons and a Gutenberg block builder.
Oxygen includes a number of advanced features for working with WordPress dynamic data. There are flexible dynamic display options and you can use custom fields in the display logic. There is a code block that accepts PHP so that it is easy to integrate WordPress functions in your templates. Most of the elements in the builder allow the use of tokens and custom fields. The Repeater element lets you easily output values from custom repeater fields.