Speaking to a couple of journalists I know who live in Italy and work on Serie A, neither expect a change to capacities or entry requirements before the game or New Year. Although they are pretty strict on proof of vaccination, rather than COVID pass from recovery.
What they are unsure of, is whether travel into Italy will be restricted at all (e.g. 5 day quarantine). At this point I'm more confident getting in San Siro than Italy! Flying out Friday though, so fingers crossed!