It wouldn't surprise me if there isn't one. I assume there are costs associated with moving the race and potentially less spectators so maybe they will be seeking to reduce costs by not having a band?
There’ll only be a few weekends left for all the postponed fixtures from earlier in the year. If they’re savvy they’ll run an F1 race as the warm up event, get a footy match scheduled in the infield, & play Topgun 2 on a big screen...