Seems like VST3 and also VST2 has a feature to report gain reduction to the DAW. Maybe some kind of extension. It is supported in Reaper and Protools, if a plugin provides the gain reduction, then it will be displayed straight within the mixer’s meter. Others dunno.
Have a watch here:
Also read here:
https://www.kvraudio.com/forum/viewtopic.php?p=9048018
Maybe Renoise could support this, too? And maybe even could sum up the reduction, if there are multiple plugins in the chain reporting a reduction…? not sure, if this only makes sense if one set to input metering… Maybe both.
Thanks for consideration!