Dolby Vision IQ is supposed to do this. No idea if it works or not, but I did just read a comment above here from someone complaining that it doesn't work well.

Dolby Vision IQ is supposed to do this. No idea if it works or not, but I did just read a comment above here from someone complaining that it doesn't work well. My AVR has "loudness management" which compresses the audio. It just doesn't work transparently so I find it irritating because it's obvious when it's changing the volume. My partner does prefer it though, but I'm more of a purist. So the answer to your question seems to be that it doesn't work well as a solution.