It contains a dynamic range compressor, but it also chains more effects including a multiband compressor, so overall it falls outside the definition of a dynamic range compressor. Naming chains of effects is always an interesting exercise, I prefer using non-existing words to avoid confusion.

Not the same thing. Normalization is about scaling the volume to either the peaks or a weighted average.

It doesn’t change dynamic range, just absolute value.

Dynamic range compression is something that happens on relatively short timescales, like say, 10ms-1 second.

This does not perform normalization. The Github repo does have the tag "audio-normalization" but the tags seem a bit all over the place.

From the readme

>An Upward Compressor is used to raise low level signals ...