I think we will see the 16" MBP by the end of October and will feature a M2X chip rather than a M1X based 16" MBP.
The reason why I believe this, is that Apple seems to have work to do to make the M1 comparable to an Intel chip (higher RAM support, higher Thunderbolt speeds, better bluetooth, multiple display support, and so on .... ). So October 2021 should be enough time to make these improvements and the A15 chip should be ready by then to modify it into a M2X chip.
However this is just speculation on my side and I could be totally wrong and Apple might release a M1X 16" MBP early next year. But I do not believe simply slapping on more cores on the current M1 chip is the way to go for the 16" MBP, hence why I am skeptical about a M1X based 16" MBP.
The reason why I believe this, is that Apple seems to have work to do to make the M1 comparable to an Intel chip (higher RAM support, higher Thunderbolt speeds, better bluetooth, multiple display support, and so on .... ). So October 2021 should be enough time to make these improvements and the A15 chip should be ready by then to modify it into a M2X chip.
However this is just speculation on my side and I could be totally wrong and Apple might release a M1X 16" MBP early next year. But I do not believe simply slapping on more cores on the current M1 chip is the way to go for the 16" MBP, hence why I am skeptical about a M1X based 16" MBP.