Related to Maria's trick is just using a jump drive or SD card.
If you plug in or pull either of the above you will typically get a system sound telling you that it's either connected and ready for use or that it (or some other) USB device has been removed.
If you yank a jump drive after doing a shutdown, and after waiting at least a reasonable amount of time for a shutdown to complete, you should be pretty safe in assuming that you are shut down if you don't get an auditory signal related to removing a USB device.
I have bent over backwards trying to find a consistent way to trigger a shutdown sound, but have not as yet found it.
Brian - Windows 10 Home, 64-Bit, Version 1803, Build 17134
The real art of conversation is not only to say the right thing in the right place but to leave unsaid the wrong thing at the tempting moment.
~ Dorothy Nevill