I feel that you are overestimating Lapis power significantly. Lifting the ocean is well into the “Sci-fi writers have no sense of scale” part of the spectrum. Consider for instance both that if she had actually picked the ocean up it should have made a far far taller pillar by a longshot than was shown, but it would still have been as silly to think it could reach even the nearest star as it would be to think Connie could do it by tiptoeing.
It’s also the same sort of thinking that would push Ronaldo into being able to move at supersonic speed (because Lapis could lift Steven to the top of the water pillar quickly, steven could move visibly on said hand and Ronaldo hit Steven with a brick once). Thats just a danger of basing powerestimating on the most powerful feat shown once particularily while involving the entire planet/space.
Instead I would base my estimates on her actual fights with the crystal gems/Jasper both fused and unfused, which would still make her a huge powerhouse by worm standards, outside of the probable reach of the undersiders, but less so.
That is a fair perspective. The alternative is that Lapis is holding back and/or not giving her all in fights like the one in Reunited, after all.
And hey, nobody ever accused this show of being consistent about scale… 😛