Actually, this isn't a issue, but maybe add compatibility with the wood/trees/tools(like axes) from another mods, it's kinda annoying sometimes that you can't craft Normal/custom wood with normal/custom axes because incompatibility :/, mods like:

-Forbidden N Arcanus
-Explorercraft
-The Midnight
-Druidcraft
-Etc etc.

And also, i love so much this mod, makes game harder even if you are further on the gameplay.

Sadly, idk how how to make datapacks, even code :c

Take this as an example:

Modpack Compat.zip

When you want to test your datapack, compress (zip) the file and move the .zip file in your saves/<your save>/datapacks directory, then type /reload if the game is currently running. You can type /reload as many times as you need while developing your datapack.

The zip I included already has Druidcraft darkwood compat written in there as an example. For other resources I'd suggest this video I made a few months ago and this wiki page for anything I forgot.