One thing I don't think you should do is quit. That will absolve Tesla of all unemployment responsibilities, potentially severance, etc. If they want to fire you, make them do it. I think you should save this email (print a couple of copies too).
You do not need to "make a decision" - just tell them you're happy to come to the office but due to personal obligations you cannot do so until January 2023 and leave it at that. Continue to reiterate this to Tesla. Tesla likely wants you to "make a decision" (and is pressuring you) so that you voluntarily quit and they don't owe you anything. Continue to do your job during your normal work hours. Respond to emails and instant messages. If you lose access to a system, send an email and ask to have access restored so you can continue to work. Document these interactions.
-edit-
Continue to work, even if they appear to "ghost" you. If you lose all of your system access, send emails and call phone numbers and document each of these interactions. Depending on how far you take this and how far things go, you may be able to recoup wages.
For example: (Thursday, June 9th 2022 8:55 am, called my manager's phone and asked if they could assist in restoring access to my email account).
Also, check out the HN Who is Hiring thread :)