It is trying to emulate some old stuff. I have not used the originals so I cant have any option on how accurate it is.
It is fairly new from 2020. It sounds good to me, and it does not have so much aliasing problems as many other (from PA and other vendors)

Spectrogram on a sweep showing aliasing.

Most of plugins from PA have a proper GUI and follow VST3 standards pretty well. V76U73 is not doing that, it is reported more than 6 month before this review and they have released a few maintenance releases without fixing the problem.
It should show QC/Automation info when pressing the right-mouse hovering on a know. I does not, instead it shows the default dialog.

It is supposed to be something like the EQ4 do with 3 different actions. (This is a DAW function, but the plugin need to tell the DAW that it is a knob)

It is many plugins that does not do this correctly, Brainworks has being very good at this. But now they are not, pretty disappointing when you can not trust a vendor.

Apple Silicon Support : NO (version v1.0.1.0) latest 2021-04-04.
It is copyright (c) Fuse Audio Labs not Neold.