Hi,
I’m afraid this is not possible – there is only a single configuration for the network. However it might be doable via a custom code:
add_action(
'asp_it_args',
function ( $args ) {
if ( get_current_blog_id() == 1 ) {
$args['index_content'] = 0;
}
return $args;
},
10,
1
);
The custom code above will turn off content indexing for blog ID = 1, change that to the corresponding blog ID.
Try adding this code via the Code Snippets plugin or to the functions.php file in your theme/child theme directory – make sure to have a full server back-up first for safety. For more details you can check the safe coding guidelines.