since the apps are used much more than the website to record observations nowadays, i think website development gets lower priority, but there is an existing request for this: https://forum.inaturalist.org/t/computer-vision-should-tell-us-how-sure-it-is-of-its-suggestions/1230.
in the meantime, sessilefielder has created a Chrome browser extension that visualizes the scores as colors (among other things): https://forum.inaturalist.org/t/chrome-extension-showing-computer-vision-confidence/35171/8.