I’ve just had a go with the $onible Pure:EQ plugin.
It works in Audacity3 as a realtime VST3 plugin …
It’s better than its free AutoEQ predecessor, Sonible Balancer
it has higher resolution: consequently better at reducing room resonance …
Sonible balancer Vs $onible pure:EQ. (“Vocals Low” = Male voice).
Free trial lasts 30 days: could be long enough to complete the project.