On the menu that will open, click on Show Word Count.
Then, Apple Pages will show the word count at the bottom center of the page.
If you want to hide the word count, just follow the same steps and in the menu you will see an option Hide Word Count, clicking on it will hide the word count.
How to see the word count on Pages step-by-step with images
If you are having trouble making the word count appear in Apple Pages, follow this step-by-step with images to set it up correctly.
Open Apple Pages.
Create a new blank document.
Click on the View button at the top left.
On the menu that will open, click on Show Word Count.
Then, Apple Pages will show the word count at the bottom center of the page.
And that's it! Simple and directly to the point.
Word count: 252 words, 1296 characters by word counter