I tried to buy guided or self guided tour of the Last Supper here (appears to be the official website):
https://www.lastsupper.shop/en/are-you-a-single-visitor-or-a-family-group/
It looks like everything is sold out for August.
However this site still has availability in August:
https://www.getyourguide.com/s?partner_id=LKIYTHV&deeplink_id=10f21690-7bf3-5342-ae55-0bb99dfec0f8&page_id=913f4456-ca03-5089-afe3-ad90af9a59e3&q=Milan&et=179522&lc=139&date_from=2024-08-16&date_to=2024-08-17
Is this legit?