If standard recovery fails, DFU (Device Firmware Update) mode allows for a deeper firmware reinstallation.
Here is a step-by-step guide to resolving the issue and successfully downgrading or restoring your device. loader for iphone9 3d101ap not found better
(often confused with a 9 due to its iPhone 8-style body) or a misidentified prototype/jailbroken device. Apple Support Fixing "Loader Not Found" Errors If standard recovery fails, DFU (Device Firmware Update)
released in 2020, which uses the same 4.7-inch design as the iPhone 8. Recommended Components If standard recovery fails