As I said before, the decision of doing the Vuelta will essentially depend on how the season goes until then.
Exactly. Tadej‘s goal is to win the TdF at least six times. Winning the Vuelta or the Giro some day would be cool - but for Tadej and Emirates, it‘s the Tour that counts.
After Lance‘s results were deleted, there still is no person who has won the Tour more than five times. Tadej could be the first, so he and Emirates will do everything they can to make him win six times.
Autumn 2022 will already be part of his preparation for TdF 2023. So he will ride the Vuelta 2022 only if it makes sense.