Stolen from Kyle van Deusens Video https://www.youtube.com/live/sGNVD8gAW34?si=BQQQR5Ulrk_S9jLc&t=4113

editor-styles

<?php
add_filter('block_editor_settings_all', function($editor_settings)
{
        //get the child theme url
        $child_theme_style_url = get_stylesheet_directory_uri() . '/style.css';

        $editor_settings[ 'styles' ][] = array('css' => wp_remote_get($child_theme_style_url)[ 'body' ]);
        return $editor_settings;

});

/*  Enqueue Customizer CSS to Editor  */
add_filter( 'bkicj_editor_settings_all', function( $editor_settings ) {
        $css = wp_get_custom_css_post()->post_content;
        $editor_settings['styles'][] = array( 'css' => $css );
        return $editor_settings;
});
?>