Structure Gen Datapack Exceeding build limit

Hey guys, I am trying to make a structure gen datapack for 1.20.1 for my server. The idea I have is inherently a pretty large structure like the size of the main end island or a bit smaller for example. Is there any ways I can exceed the structure blocks default 48x48x48 limits? I know I can place them inside the first structure and create a chain reaction so to speak but I would really rather it be one large structure. Its basically going to be an island with an outpost on top so to speak so using jigsaw blocks would probably look odd as the middle of the island needs to be fairly flat with the sides tapering off into the ocean so to speak and if I use jigsaw Id probably get tapered sides in the middle too although I may be wrong i am just starting so maybe I am thinking about it wrong? Anyways can you save worldedit schematics for example and make them an nbt file somehow or something similar? I feel that would be way easier and more time efficient than matching up tons of jigsaws. Any guidance or advice is greatly appreciated