What is the new feature or improvement?

It would be nice if you could add a small compatibility for Mods that have tools that break bedrock, more specific preventing the final layer of bedrock in world from being broken. (preferability in a config option).

Can take my own mod as an example https://modrinth.com/mod/yeeterite allows breaking bedrock but also contains a config to disable breaking the last layer (works by simply checking the world bottom y). However when using it with vein mining and mining one block above the bottom vein mining will break the bottom layer.