Zoom meeting software: how to end the call though pressing a physical button?

I found zoom provide a shortcut to end the meeting.

Command + W

https://support.zoom.us/hc/en-us/articles/205683899-Hot-Keys-and-Keyboard-Shortcuts-for-Zoom?mobile_site=true

I did a brief bit of searching and quickly found the Zoom official keyboard shortcut list.

On MacOS use Command + Shift + V to end Video. You can then stop smiling and use your hands to end the meeting.

Depending on how your meeting device works, you may be able to modify the keyboard shortcut for ending video to the key pressed on that device. But, as I note: this depends on how your meeting device works and whether it communicates using a compatible method with your computer.