Sage 10 : add theme styles in TinyMCE ACF?

Hi there, I’m trying to load my theme style in the TINYMCE ACF provide but with no luck.
This is my actual code :

add_filter('tiny_mce_before_init', function ($mce_init) {

    // $content_css = get_stylesheet_directory_uri() .'/css/editor.css';

    $content_css =  asset('editor.css')->relativePath(get_theme_file_path());
    // 404 : https://xxx.test/wp-admin/public/editor.css?wp-mce-49110-20201110

    $content_css =  asset('editor.css');
    // 404 : https://xxx.test/wp-content/themes/xxx/public/editor.css?wp-mce-49110-20201110

    $content_css = \Roots\asset('editor.css');
    // 404 : https://xxx.test/wp-content/themes/xxx/public/styles/editor.css?wp-mce-49110-20201110

    //Grab existing stylesheets and then add our new $content_css
    if (isset($mce_init[ 'content_css' ])) {
        $content_css_new =  $mce_init[ 'content_css' ].','.$content_css;
    }

     $mce_init[ 'content_css' ] = $content_css_new;

    return $mce_init;
});

How do i get the url of my assets ?
image

similar to the approach with Sage 9.x:

add_action('after_setup_theme', function () {
    add_editor_style(asset('editor.css')->uri());
}, 20);

Thank you for your help. While testing your code i found my mistake :
All my tests were made while working in “yarn dev” mode.
The moment i tested using “yarn build”, the css was loaded in tinyMCE correctly without any code ! :upside_down_face:
I juste had to made a new rule in editor.css

#tinymce {
 /* code here */
}

note: i was already using this in setup.php

add_action('after_setup_theme', function () {
 add_theme_support('editor-styles');
  $relAppCssPath = asset('editor.css')->relativePath(get_theme_file_path());
  add_editor_style($relAppCssPath);
}, 20);