Open the Find My app
Tap People
Select the person you want to locate
View their location on the map
If needed, tap Directions to open Maps
If the person is not visible, make sure they have shared their location with you
Check that both iPhones have Location Services turned on
Make sure Find My is enabled on both devices
Use Messages and tap their name to see shared location if available
Ask the person to share their location from Find My or Messages