Game history not updated in Waypoint

Hi. I started playing Halo in the LAN party days with the first Halo.

I stopped gaming due to life’s circumstances: work, family kids.

My wife, during the pandemic, got me a new Xbox so I started playing again.

Now with a new gamer tag, how can I join my game history from my old tag with my new one? Halo Waypoint does not show my history, just a few matches I recently played on Halo 5 multiplayer.

I do recall I did some kind of merge, Microsoft recognized I had another gamer tag.

I did a lot of multiplayer back in the day.

Thanks for you help!