OK understood, thanks.
I’ll just have a ‘search all groups’ for now.
I added the code to functions.php but it caused a critical error on the site.
“There has been a critical error on your website.”
So I’ve had to remove the code.
If you can take a look, I’ve changed the FTP access to /wp-content/themes/ for you to access functions.php in the child theme: generatepress-child
Many thanks for your time and patience!