I am using OpenHab 3.3.0 mainly using a sitemap in the iOS App. Since the iOS App updated to version 2.4.52, my sitemaps are not listed anymore. Tested on iPhone 13 and 10.
In the settings, there is one called API Security. Surely you changed it, right? Because when it is in strong mode, sitemaps are no longer available on Apple or through the web interface.