The string itms-services://?action=download-manifest&url=https://... refers to a specific used for Over-the-Air (OTA) application distribution. It allows developers to install enterprise or ad-hoc iOS applications directly from a web browser without using the App Store. What is the itms-services Protocol?
If you encounter amp-url in logs or code, treat it as a custom or erroneous parameter. It will be ignored by iOS. Itms-services Action Download-manifest Amp-url Https