Aîkido (mixer/VCA/Side Chain/feedback and more) of Bastl does a lot in this vein, I used it as a swiss army knife and it pairs fantasticly with Dark Matter, it can do side chain, VCA, env. follower, it has clickless mute buttons, can do feedback too.. And their small but powerful Waver (not in production anymore but maybe in the second hand market) mixes too, and add wavefolding and "break" (another way to feedback and break the signal) to the equation..

Oops I forgot, Aîkido can do submix too, super practical so you could apply FX on a given couple of signals, then it's side-chained (for example)...

Not to mention the guys there are very very kind (and funny, actually).

look here :

darkmatter & waver :

Dark Matter video manual

You'll need to activate the subtitles unless you speak French !

https://bastl-instruments.com/eurorack/modules/aikido

https://bastl-instruments.com/eurorack/modules/waver