How do I restart a Mac Mini M4 that is frozen?

Following online directions to perform a clean install of Mac OS Sequoia, I used disk utility to erase the Macintosh HD on my Mac Mini M4 (2024).

After this action, I could not boot the computer entirely, as it freezes when the Options screen displays. Once the Options screen displays, a spinner rotates clockwise just above the Shut Down and Restart icons. Neither the Bluetooth keyboard nor the magic mouse connects. The computer is frozen.

I have tried numerous ways to restart, including disconnecting the power cord, pressing and holding the power switch, and reinstalling it; double-pressing the power switch to cause the orange light to flash on the front panel; and various combinations of control, option, and command + R. All to no avail. 

I may have powered off the computer during the Mackintosh HD erase process since it appeared complete, and the computer shut down. However, I am not 100% clear on this. In any case, the computer will not restart, and I hope one of the Apple Geniuses knows how to correct this problem without sending the machine back to Apple. This would be difficult, time-consuming, and expensive for me, as I am located in the Cayman Islands. 

Thanks for your attention and any help you can provide.