accurate call. that live rock looks as good as mine man and mines been simmerin ten yrs. you can lift out, rinse off, and put back in/re arrange and clean off that live rock as often as needed, we're free to handle. keep nice slightly bold magnesium levels if you want to detail a param to help coralline.
lighting causes it to seat/recede in various parts of the tank is pretty variable. after changing to led, the coralline on my lr did not die it held, but I scrape zero coralline off the glass and six years ago the coralline would opaque up the whole pico. lighting was only change, and glass growth stopped. its so variable...only mass recession or bleaching would concern me. hand clean/rinse off any growths/scums/algae as you guide that rock into mature compliance things are going well per pics.