It is no longer offered for the refresh model S/X. It is, however, still offered for the pre-refresh model S/X vehicles that are covered by the basic vehicle limited warranty. The agreement was offered for a short amount of time for the refresh S/X. I remember it being available in my app. Not sure how many people signed up for it.
As the owner of a 2022 model X, I don’t think this is a good sign. If Tesla doesn’t feel like they can make any money off the extended service agreements on these vehicles, where they obviously feel like they can on the 2019 and 2020 pre-refresh S/X, it would seem to indicate that the refresh models have a lot of problems. I have had many problems with my MX and while I was very excited to purchase the vehicle, I now regret the purchase.