How do I partially submerge boat structure in water using 2023.4?

I'm trying to generate a boat structure which I would like to be submerged 4 blocks deep in water. I'm having trouble since the specific height adjustments were removed in this version for structures. I've tried to generate the structure as a feature, but it is larger than a chunk which causes it to stop generating halfway (The boat is 13(x) x 24(y) x 30(z) blocks). If anyone knows how to adjust structures slightly or generate a larger feature it would help out a lot. I apologize if this is a simple fix it's my first time modding.