To add a family member's location on your iPhone 14 running on iOS 16, you can use the "Find My" app. Firstly, ensure that the family member has granted you permission to share their location. You can ask them to go to the “Find My” app, tap on their iCloud account, select "Share My Location," and choose your contact to share their location. Then, on your device, open the "Find My" app, tap on "People," select the family member you want to add, and tap on "Share My Location." You'll be prompted to choose how long you would like to share their location, and your family member will receive a notification requesting their consent to share their location with you. Once they've granted consent, you'll be able to see their location on the map in "Find My" app.