unlock an iphone that is disabled

You will need a computer with iTunes (Mac or Windows) or finder if using a Mac running MacOS Catalina or Big Sur. Then you erase the device by restoring it to reset it. Once you’re able to boot back into the setup menu, use your iTunes or iCloud backup to restore your content.

See -> If you forgot the passcode on your iPad, or your iPad is disabled - Apple Support

Start here: https://support.apple.com/en-us/HT204306