Nowhere, according to Dave Meltzer of f4wonline.com. During the wedding angle between Bobby Lashley and Lana on an episode of Monday Night Raw, Liv Morgan interrupted the segment to announce her love for Lana. The following week, the angle between the two women was dropped and never mentioned again afterwards.
Meltzer mentioned that a source told him there were never any plans for the storyline to develop beyond that initial segment. It was written in by Paul Heyman as a way to pop the crowd and get eyes on Liv Morgan, that is all.