Welcome to the community.
https://www.cmxlog.com/15/
Development has just begun ...
This means that LineageOS is being developed on the Oreo basis.
It means you have to wait.
For time is theirs, and we can not demand anything. Let alone speculate when they are going to launch, or if they are going to launch.
But you are a lucky guy, because here, there are developers like
@vladimirs77 and
@vm03 that, without measuring efforts, bring news to the community.
Follow the topic below. But do not ask about ROM launch times, or ask for anything to be fixed.
Make the backups and remember that it is experimental. Do the clean install. There may be bugs and the most you can do is try to fix them and share the solution, or report them.
And, thank to
@vladimirs77 , for the unofficial version he just released.
https://androidforums.com/threads/lineageos-15-0-for-lg-l70-oreo-8-0-unofficial.1200703/
Thanks
@vladimirs77 !
Each new version is a surprise. And when they decide that development will continue for our device, we can only be grateful!