It sounds like you’re dealing with a on an iPhone 9 (which would be the iPhone SE 2nd gen , model identifier iPhone12,8 – not 3d101ap; that identifier doesn’t match any known iPhone).

: If the tool allows, you may need to manually download the correct "Ramdisk" or "Loader" file for the iPhone 7 (A10) and place it in the application's Check Connection Mode : Verify if the tool requires the phone to be in rather than Recovery Mode. Standard Recovery Mode often prevents deep-level loader execution. Use Official Channels

Many restoration tools require you to manually point to a BuildManifest.plist . If this file doesn't match the firmware or the device, the loader won't be identified.

: On a Mac, check for the latest macOS updates. On Windows, ensure you are running the most recent version of iTunes or the Apple Devices app.