Update:
Above code worked like so:
add_filter('acf/format_value/name=listing_price', 'fix_number', 10, 3);
function fix_number($value, $post_id, $field) {
$value = number_format($value);
return $value;
}
I can now see the correct comma separators for new entries that I place in the number field.
Any suggestion as to how I can ‘correct’ previous entries as well?
Otherwise, I have to manually adjust more than 100 different entries/listings!!
THanks for any suggestions.