I think the support of Craft Tweaker would make the configuration of the mod easier for modpack makers.

There is already a fair amount of support.

There is no documentation on the crafttweaker docs about this. So how could we know?

on the crafttweaker docs

I do not control those docs. They apparently accept pull requests if you want to contribute. I also accept pull requests for the Ex Nihilo Creatio github wiki if you wish to contribute documentation.

So how could we know?

I don't know.