Hi,
I’m not sure, but you could probably use the “acf/load_field” filter.
https://www.advancedcustomfields.com/resources/acf-load_field/
And a small function like :
function read_only_field($field) {
$field[‘readonly’] = true;
return $field;
}
add_filter(‘acf/load_field’, ‘read_only_field’);
You could target your field using the filter :
add_filter(‘acf/load_field/name=field_name’, ‘read_only_field’);
add_filter(‘acf/load_field/key=field_key’, ‘read_only_field’);