Hi, idk why but my Service Record in Halo Reach was removed when i changed my gamertag
I had that issue a few days ago. It seemed to fix itself after I completed a campaign mission, so maybe give that a go?
Reach stats will not show on your new gamertag until you play a campaign mission or a matchmaking game.
When you change Gamer tags your stats desyncy due to the way legacy stats on older games work. Read over this thread for more info: https://www.halowaypoint.com/en-us/forums/8f4648981f554a9d86527a5754966e89/topics/legacy-stats-not-updating-on-waypoint/ccfffa7a-457c-432a-9b4a-6b885effef2d/posts