Thanks guys,
I missed it inside the Tesla app. It shows an expiration date one year from the day I purchased the car (March 2023) What threw me off is that my credit card was just charged the monthly subscription fee but that was apparently for the car I just sold.
I disputed the charge online with my credit card app and it was immediately credited back to the account.
Too bad they do not give you one month or one year free FSD. As much as I like basic summons (often show and tell) and the chime upon green traffic light, it's hard for me to justify the $12K.