[FEATURE] Loudness meter effect/window.
There is an audio effect in Adobe premiere that measures the loudness of the audio (mainly used for TV production). This effect measures the DB level and displayed with a graph as well.
This is applied as an audio effect on the audio track/clip to measure the loudness more accurately.
Attached a photo of this effect.
Probably it can be a similar idea in HitFilm but as a window next to the meters window or as an effect on the audio clip/track.