Working with loaders and boot-level components carries risk. Prefer official recovery paths and verified binaries. Keep documentation of the device identifiers, software versions, and logs to expedite help from vendor support or experienced repair communities.
Some tools read iPhone9,3 but expect iPhone9,1 (the Intel modem variant). The loader database may have entries for the 3D100AP (iPhone9,1) but not the 3D101AP. Your tool says “not found better” because the existing loader is incompatible (not “better” or optimized). loader for iphone9 3d101ap not found better