Netherite Pickaxe cant break stone it saying i need diamond pickaxe or iron pickaxe to mine it please fix

I think you just need to add this to the config iirc.

Probably a very good idea to add this as a default entry.

is 128 or 256 a good default?

Had a short back and forth with the guy who bumped this (not OP), and adjusted defaults to be around half of the vanilla defaults - also added vanilla reference to config.