I was in Meraviglia YC in January, butler gave me a firm "no" for getting a lounger on my balcony. Granted that one was a bit small/narrow, but I've read a few posts that pax in the extra-large aft balconies are also being told no, supposedly because it could "scrape the glass."
I'm on the Meraviglia next month and specifically paid for the (huge) aft balcony to add a lounger. Any recent experience with this for better or for worse?