By 2021, the iPad 3 had been declared "obsolete" by Apple. This means:
Once the jailbreak is finished, the tool will display the "Start" button. Click it to initiate the iCloud Activation Lock removal process. Wait for the notification that the bypass is complete. Your iremove tools ipad 3 upd 2021
iRemove Tools explicitly listed iPad 3 (iPad3,1 / iPad3,2 / iPad3,3) as supported. The 2021 update added support for iOS 9.3.5 and 9.3.6, which was previously problematic. By 2021, the iPad 3 had been declared "obsolete" by Apple
Once verified and jailbroken, you can purchase a license. After payment, click the button to complete the process. Bypass Activation Lock [iPhone & iPad] - iRemove Software 20 Aug 2021 — 1 / iPad3