Why isn’t the PERCENTAGE of battery usage shown anywhere on the opening screen?

Jinx ~ Here's how to add Apple's "Batteries" widget to your iPhone's Home Screen:

Use widgets on your iPhone and iPod touch

Screenshot of "Batteries" widget in use:

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Just swipe down from the top-right corner of your display. On iPhone SE (2nd generation), iPhone 8 or earlier, iPad, and iPod touch (7th generation), you can see the battery percentage in the status bar. Go to Settings > Battery and turn on Battery Percentage.

Show the battery percentage on your iPhone, iPad, or iPod ...