Hallo,
is it possible to add more effects ( various Effects from other Mods) as a data pack? Unfortunately I don't really know java, so I couldn't write a complex mod either.
:-)

Not possible at the moment unfortunately, this would require a rewrite of the mod.

One quick Idea: Not a rewrite from this mod, a creation of an Addon that makes it possible.

This is now possible in the 2.x version of this mod.