Click the gear icon (shown right) to enter “Settings”
Once in “Settings”, select “Cellular” as highlighted in the image.
Inside the “Cellular” menu, if you see “Personal Hotspot” as a setting, shown right, then your hotspot is enabled, and is ready to be configured.
If “Personal Hotspot” is not enabled, it will say “Set Up Personal Hotspot”.
For more information, see the link below: https://support.apple.com/en- us/HT204023