I want to change the default location of my iPhone

Hello BillyBem, If you have your Location Services turned on (Settings > Privacy & Security > Location Services > ON. You can go to Find My app. At the bottom of screen click on Me. Under My Location you will see Location. Click on it. You an press Edit at the top right of screen and select one of the default names or add a Custom Label. Also FYI in the Apple WX App the My Location is your current Location for WX. If you drive to another City the My Location City should change IF your Location Service is turned on. Hope this helps.

BillyBem, Check In Settings > Privacy & Security > Location Services > Turned on > Scroll down to Find My or Maps > You should see the the Location Services Icon Arrow > Click on Maps > Allow Location Services and choose one of the options. I use the "While Using the App or Widgets" option. Next make sure Precise Location is turned on.

Hello BillyBem, Ok. To turn on Find My go to Settings > click on name Apple ID at the top > Scroll down to Find My and click > Click on Find My Phone to and slide to ON switch.