The Oreo beta update for the LG V30 that was sent out a few days ago was confirmed to not have Treble implemented. A customer rep, however, has claimed otherwise, which may mean that future builds get Treble support.
https://www.notebookcheck.net/LG-V30-Oreo-update-to-have-Treble-unlocked-version-now-available.267784.0.html