To add an update to this I have started moving focus to see if I can just make a bunch of smaller landscapes as their own islands and covering all that in an ocean, problem with this is the ocean bounds will only extend to the edge of the main landscape it is initially placed on, what I would need is a way to expand the bounds of the ocean to cover the other terrains as well. Looking it up it sounds like I would need to go into the WaterZone object in the world and on the WaterMesh static mesh I would need to increase the tile size, seeing this done in a video on an older version of the engine seems to expand the ocean as you would think, but when I do it nothing seems to happen and if I go with a number that’s more than double the size of the default tile size the ocean seems to shrink instead of expand.
Haven’t found an answer on expanding the size of an already placed ocean that works in the current version yet but hoping to soon.