This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 12 January 2022 | 
| Upload Date | 08 January 2022 | 
| File Name | iPad_Pro_A12X_A12Z_15.2.1_19C63_Restore.ipsw | 
| File Size | 6.08 GB | 
| SHA256sum | eaa1e54626baf4a753129ebc98b4399ea4beafb7344b6a9d6c453b123b73eb79 | 
| MD5sum | fa7ddca3b3b304ff901db8549705ca23 | 
| SHA1sum | 7071082e17898edeba753b9f1a3d9e0b6b6f55ca | 
| Identifier | iPad8,5 | 
cd ~/Downloads.idevicerestore -e iPad_Pro_A12X_A12Z_15.2.1_19C63_Restore.ipsw and press Enter.