how do you shut down a macbooko pro

Here is How to turn your Mac on or off - Apple Support

When running, the power button will put the Mac to sleep (short press, ~1.5s) or hard halt it (long press, ~10s).

Mac keyboard shortcuts - Apple Support

Usual means, as mentioned above and in the linked info, is to use the 🍎 menu.

peter_watt wrote:

Good grief there's a KB article how to turn off! They think if everything 😂

The power button on the iMac is not at all in an obvious location, having helped more than a few folks to find that.

And that obscure (arguably even bad) iMac power button placement being why I know about that tech note.

Nor might be the use of the 1.5s button-press sleep and the 10s long-press halt be obvious to folks, either.

So... yeah. There’s documentation.

It is not advisable to use it unless the normal method fails, but you can hold down the power button for a few seconds.

Why can you not go to Apple menu top left and click on Shut Down?

Good grief there's a KB article how to turn off! They think if everything 😂