Run the repack tool. It should detect the device in PwnDFU mode.
iPad 5th, 6th, 7th generation, iPad mini 4, iPad Pro 1st generation (9.7″ / 12.9″), iPad Pro 2nd generation (10.5″ / 12.9″), iPad Air 1, iPad Air 2 magiccfg 13 repack
It enables the device to enter a specialized diagnostic mode, allowing read/write access to the device's NAND configuration. MagicCFG 13 Repack vs. Original MagicCFG Run the repack tool