• The ability to track all of your play in one place and view it across all platforms.
    • All of your previously earned stats will be added in and displayed in-game.
      • There may be a few minor edge cases where a small amount of data could be missing.
  • All LTM stats are combined and tracked in a singular tab. This means that any previous LTM stats you’ve earned will be moved out of the Solo/Duo/Squad tab and into the LTM tab.
    • The exception to this would be Large Team Mode LTMs. We don’t track stats in those game modes.

Source: Epic Games Website (view original article)