An issue with the new 2022 Model 3 and Model Y LFP batteries has left drivers stranded without a charge in both the main and the auxiliary 12V packs. The LFP battery calibration may be the culprit and Tesla now recommends that all owners who got the early Model 3 deliveries charge to 100% at least once a week to remedy the problem.
https://www.notebookcheck.net/Tesla-using-one-of-the-big-LFP-battery-advantages-to-remedy-dead-12V-units-on-the-new-2022-Model-3.606788.0.html