I found Raxxla in ?????

[Red Rocket]

This goes for finding anything new in Odyssey or Horizons 3.8 ( Legacy ) and this could turn out to be kind of a mess.
Two separate data bases of found Elite Dangerous objects, Planets, Systems, Guardian Sites, ect.

This will pit a burden on some 3rd party sites, EDDB, INARA, ED Discovery ect.

On the bright side you can now be in two different places at the same time, Odyssey Bubble, Legacy out exploring

 

[Rainbro]

INARA and probably others are ignoring Legacy for the time being. Story-content should be unique to Live, so anything "new" will be there. Generic first discoveries outside of that don't matter much to people beyond themselves.

I also doubt finding Raxxla will be an issue.