Improve selectability

[strarsis]

Is your feature request related to a problem? Please describe.
Some themes add a background image or complex background or just want to format some text in page body.

Currently, I have to use this selector, preferably either as CSS preprocessor or CSS variable:

$editor-gutenberg-background-selector: ".editor-writing-flow > div > div > div > .editor-block-list__layout";

The styles are enqueued, I try to use as much frontend-styles for backend as possible:

/**
 * Gutenberg scripts and styles
 * @see https://www.billerickson.net/block-styles-in-gutenberg/
 */
function gutenberg_scripts() {
    wp_enqueue_style(
        'editor-theme',
        asset_path('styles/editor.css'),
        false,
        true
    );
}
add_action( 'enqueue_block_editor_assets', __NAMESPACE__ . '\\gutenberg_scripts' );

Especially generic text elements like <p>, <ul>, etc without a style variation need to be selected, too.
When I just select all <ul> I would either select all <ul> in WordPress backend and inspector panels, too - or nothing of them because I use a selector for the front end markup only (e.g. body:not(.wp-admin) ul, main ul).

Describe the solution you'd like
Some attribute or class for the innermost editor wrapper so background and typographic styles can be safely and easily applied by a theme (or plugin).

Describe alternatives you've considered
The alternative I am currently using is some custom selector that may change between Gutenberg updates which requires themes to handle different DOM structures for different Gutenberg versions.

[strarsis]

https://developer.wordpress.org/block-editor/developers/themes/theme-support/#editor-styles

[mtias]

With the editor iframe targeting editor only / frontend without disturbing the admin chrome should be a lot easier.