find my friends--When I changed my Apple ID, all my friends on Find My Friends locations only say "location not available" What can I do to remedy this?

Hello,

If you see a No location available label for friends

You might not see your friend's location for these reasons:

• 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 Location Services in Settings > Privacy > Location Services or in Settings > Privacy > Location Services > Find Friends.
• Your friend isn't signed in to Find My Friends on the device being located.
• The device is in a country or region where Apple doesn't offer this feature. This feature might not be available in all countries or regions due to technical limitations or local law.

A device's previous location is available for two hours. After two hours, you see Location not available.

More info here:

Get help using Find My Friends - Apple Support

What to do after you change your Apple ID email address or password - https://support.apple.com/HT204071 - After you change your Apple ID email address or password, you might need to update your sign-in information with any Apple services that you're using.