It seems to have gone to everyone, whether you already have 2FA set up or not. Maybe there's a reason why Tesla are pushing out this message.
While I appreciate receiving email about setting security options can be a concern, there really aren't the kind of signs we are taught to look for in phishing emails at my employer.
1. Perfectly acceptable grammar and spelling
2. It's not excessively creating urgency, i.e. do this now or you will lose money type stuff.
3. It's not demanding you click on links as the only option, and the links there are to tesla.com and not something else
4. It's come to the email registered with Tesla and not others
Our security team send us email to try and catch us out nearly weekly, and we have to report it or get some eLearning forced on us, this would not meet the bar of concern.
Also, if you don't have 2FA set up previously then you need to have a word with yourself. Your Tesla password is the top of the stack in terms of the access it provides, people with it see where your car is on a map then come and drive it away, MFA is the only control that trumps the password, even Pin2Drive is avoidable with the Tesla account.