While adding effects during the mix, volume - as simple as often underrated - play a fundamental role.
If it's increased by the effect you apply you should compensate it in order to realize what the effect really does to your track ("gain staging").

But if you need to do for each effect, it could become time-consuming. So, does anyone know any plugin to do it automatically? I mean I'm searching for a plugin that let me auto-regulate the volume at the end of my effect chain by turning on and off the previous effects, like in iZotope Ozone.

Any idea?
I work in logic pro x

 

kind of :
https://www.hornetplugins.com/plugins/hornet-vu-meter-mk4/

 

TBPro AB_LM, Ian Shepphard's Perception, LetiMix gainmatch.