how to display the post date before the post title on the blog page

Hi,

You can disable the current "Display post date" by unchecking it through Appearance > Customize > Layout > Blog.

You then add this PHP snippet so it displays above your post title.

add_action( 'generate_before_entry_title', function() {
        echo '<div class="entry-meta">';
            generate_do_post_meta_item( 'date' );
        echo '</div>';
} );