https://www.wootechy.com/change-location/why-does-it-say-location-not-available-on-imessage/
Top 3 Fixes for Location Not Available on iPhone iMessage Issue
Learn the reasons why does it say location not available on iMessage, and the top 3 solutions to fix it. Also, check how to manually set iMessages' location.
available on iphonefor locationtopfixes