I have read Q1 2020. This is one example:
"We expect the final rollout will begin for G7 ThinQ in early-Q1 of 2020 and for V35 ThinQ in late-Q1 of 2020, for unlocked devices only."
Also read a similar statement on an actual LG forum; however, they also added the final is up to the provider but unlocked should be early 2020 with no definition of what "early" actually means.
I'll believe it when I see it and I do have a factory unlocked version.