Help with changing sea level in world generation datapack

Hello everyone,
I’m trying to create a datapack that changes the sea level in the world generation. I attempted to modify the sea_level in datapack/data/minecraft/dimension/overworld.json, but it doesn’t seem to work.
Could anyone guide me on how to achieve this?
For context, I’m using Minecraft version 1.21.4, and my pack.mcmeta format is set to 61.
Thanks in advance for your help!