Enqueuing custom CSS inside the Oxygen Builder

plugin.php

/**
 * Loads CSS inside the Oxygen Builder
 */
add_action( 'plugins_loaded', 'lit_oxy_builder_css' );
function lit_oxy_builder_css() {
    
    if( class_exists( 'CT_Component' ) ) {
        add_action( 'oxygen_enqueue_ui_scripts', 'lit_oxy_ui_scripts' );   
    }
}

function lit_oxy_ui_scripts() {

    wp_enqueue_style( 'oxygen-custom-ui', plugin_dir_url( __FILE__ ) . 'css/style.css' );

}