There was an experimental Nyquist plugin for Audacity2 which did that , but I don’t think it works in Audacity3. 
Tokyo Dawn’s free PRISM plugin will draw a spectrum plot of any audio file you load into it. If you do two* of those: the 2 different mics recording the same person/location/script, then load them both into PRISM you can measure the (manual) corrections that need to be made so they match, e.g. using Audacity’s equalizer.
[* If you can post such recordings I can supply you with corrective EQ settings ].