Hi,
Can you tell me which widget you’re trying? If you’re using a text widget, then use this technique to enable the shortcode in the text widget. Add this in your child theme’s functions.php
add_filter(‘widget_text’,‘do_shortcode’);
More info: http://www.wpbeginner.com/wp-tutorials/how-to-use-shortcodes-in-your-wordpress-sidebar-widgets/
That will enable the shortcode in the text widget, if you’re using some other widgets, let me know.
PS: You can use this Child theme, https://colorlibsupport.com/t/centering-other-widgets-on-the-home-page/#post-90223 that will support the other widgets in the home.
Let us know,
Thanks,
laranz.