Hello,

By the looks of it you can't disabled charred tree in configs, I have dynamic trees installed too. I have set the config for it to 0 or 0.0 or 0.0001 and nothing changes, even changing whitelisted biomes dose nothing,

That would be because dynamic trees is now controlled via a datapack (or "tree pack") rather than the configuration. My recommendation would be to check out the dynamic trees discord on how to overwrite or replace the treepack that Mystical World uses.

I'm unfortunately not very well-versed on dynamic trees beyond this.