In the CMS collection admin interface [ those black screens ], that sort ordering is just a convenience to help you navigate your CMS data. It has zero impact on how your data appears in your published site.
On your actual website, sort ordering is defined in each collection list’s settings.
Go to the collection list that’s bound to your data, click the settings icon top right, and then scroll down until you see sort settings. That’s where you’ll set e.g. Sort by Order, Smallest to Largest.