"mios.haimawan.com" refers to a legacy third-party app store and web platform developed by the Chinese tech company
If you require custom sideloading for development, utilize open-source desktop relay tools that use your own personal Apple ID rather than sketchy public enterprise certificates.
Here is why this matters:
The site ://haimawan.com is historically associated with a third-party iOS app store (often called "Haimawan" or "XY Helper") used for sideloading apps without a jailbreak.