Those machines have a boot ROM recovery mode. If you wipe off those essential partitions then it becomes visible as a USB device when attached to a Mac or PC.

Those machines have a boot ROM recovery mode. If you wipe off those essential partitions then it becomes visible as a USB device when attached to a Mac or PC. On Linux, you can then use idevicerestore to recover. Or you can use Configurator from a Mac. macOS Recovery is an essential part of the security model. It is the environment that you can do security downgrades from (to disable Secure Boot for your OS install notably). macOS on Apple Silicon uses per-OS security policies instead of a global machine one, allowing to have an unsecured install and a secured one at the same time, with just a reboot needed. As such, macOS Recovery cannot be modified.