"Layout Options" Missing from custom post type – NOT RESOLVED

This topic was closed but was not resolved so I am reposting.

I have multiple post types, but the example is not clear as to how to add more than one. I am getting an error when trying to update it. I think the issue is with the comma separator.
What is the correct code to add multiple custom post types to the example as outlined in

function add_builder_to_posttype($metabox)
{
	foreach($metabox as &$meta)
	{
		if($meta['id'] == 'avia_builder' || $meta['id'] == 'layout')
		{
			$meta['page'][] = 'event' ,'bar' ,'restaurants', 'saunas'; /*instead add the name of the custom post type here*/
		}
	}
	

	return $metabox;
}

When I try that code I get an error from wordpress when updating the functions file.