Classic Editor hooks

2 filters and actions, read from the plugin source. Add these in a theme’s functions.php or a Code Snippet.

filter

wpextended/classic-editor/disable_gutenberg

add_filter( 'wpextended/classic-editor/disable_gutenberg', function ( $value ) {
    return $value;
} );

filter Pro

add_filter( 'wpextended/classic-editor/excluded_post_types', function ( $value ) {
    return $value;
} );