Open Messages
Open the conversation
Tap the contact name at the top
Tap Info
Tap Send My Current Location
Or tap Share My Location
Choose the sharing duration if prompted
Open Maps
Tap the blue dot for your current location
Tap Share My Location
Choose the app or contact
Open Find My
Tap People
Tap Start Sharing Location
Select the contact
Choose how long to share
Open the contact card in Contacts
Tap Share My Location
Select Messages, Mail, or another app