Configurable Lava Level

Is your feature request related to a problem?

Yes.
So I wrote a datapack, which pulls my world's lowest Y to -256.
After many attempts and asking a few AIs to help me with figuring out lava, lava kept pooling around -54Y.
Turns out Mojang hardcoded this value.
I reported it as a bug, and it was closed saying "request a feature, this isn't a bug"
Which I find funny, they give us the control in a datapack to go down to -2032Y, but our caves will be full of lava.
My bug MC-307994

Someone commented stating another bug MC-237017
This one (same issue as mine) remains open, so that's good news that its not closed, but bad news is in 5 years it hasn't been fixed.

Describe the solution you'd like.

In net.minecraft.world.level.levelgen.NoiseBasedChunkGenerator:

This is the hardcoded value. Id love to see a config option for this, or another alternative if someone has a better idea.
Even if you took the world's min y + 10, would be better than what they have here. But I'm thinking config might be better?!?!?!

Describe alternatives you've considered.

I did a quick patch, changing this value to -245 for my own testing server.
I'd rather not have to patch this for my own server, I'd prefer to see a configurable value.

Other

Just a food for thought idea:

Start by reading net.minecraft.world.level.levelgen.NoiseBasedChunkGenerator and the hardcoded lava level identified in the issue. Compare the requested configuration approach with the existing world-height behavior and the linked reports MC-307994 and MC-237017. Done means servers can control the lava level without patching the server, while generation remains correct for custom minimum Y values.