How do I turn off Private Browsing Mode

See the following from Browse privately in Safari on iPhone - Apple Support

To hide the sites and exit Private Browsing Mode, tap , then tap  to open a different Tab Group from the menu at the bottom of your screen. The private sites reappear the next time you use Private Browsing Mode.

To close private tabs, tap , then swipe left each of the tabs you want to close.

Note that if you don't have other tab groups, click the two overlapping rectangles, click Private at the bottom of the screen, click "Start Page."