Now, it's worth noting that a recent beta -- I believe beta 8 -- of Big Sur added the Emoji 13.0 characters, like what will ship in 14.2. Thus, I suspect that we see beta 10 of Big Sur sometime tomorrow or Thursday, followed by a GM the following week. I suspect the macOS team will not drop Big Sur with one day's notice for developers this go around
, so I would predict a final Big Sur release to ride along with 14.2 in that October 26-28 timeframe.
I offer this speculation based purely on pattern recognition, with no insider information, and could be very, very wrong.