Komaki_z,
Thanks for the additional information regarding your Find My issue with your friends.
The next step is to confirm all the following:
- Your friend might need to correct the date on their device. Tap Settings > General > Date & Time.
- The device is off or isn't connected to cellular or Wi-Fi.
- Your friend turned on Hide My Location in Find My Friends.
- Your friend turned off Share My Location.
- Your friend turned off Location Services in Settings > Privacy > Location Services; Settings > Screen Time > Content & Privacy Restrictions > Share My Location; or in Settings > Privacy > Location Services > Find Friends.
- Your friend turned off Share My Location in Settings > [your name] > Find My > Share My Location.
If you need continued assistance, then please reach out to our AppleCare phone support team via this link: Get Support.
All the best!