How do you increase text size?

First, you'll need to add Text Size to Control Center. Tap Control Center, then tap Manage Controls. Tap the + sign next to it. Once you've done that, swipe up from the bottom, or if you're using the iPhone X, swipe up from the top right. Tap the small A next to the bigger A. Tap the bars to increase or decrease text size.

Just type it on the settings and you will find it at the first box.