This section gives you step by step instructions on how to make the text bold in iOS 15, with pictures of the screens to help.
1. Tap the Settings icon on your Home screen to open the Settings app. Scroll down and tap Accessibility.
2. On the Accessibility screen, tap Display & Text Size.
3. On the Display & Text Size screen, tap the toggle switch for Bold Text to turn it on.
4.When you are happy with your settings, you can return to the Home screen by swiping up from the bottom of the screen or by pressing the Home button on devices with a physical Home button.