What was the damage ($)?
Have you tried fuse-pull reboot of the MCU? Small chance, but I might try it before factory reset. Also, just a quick share of my prior experience - I have in the past unpaired the phone from the MCU, however, somehow the MCU still remembered. The weird side effect was that for some reason whenever my phone was near the MCU, all sound disappeared from the MCU! A hint was that the sound was there for a short time after boot, but as soon as the phone was found, MCU lost all sound through speakers. I know this is not your issue exactly, but it showed me that even though I unpaired the phone, somehow the MCU still remembered it, but worse, it didn't fully pair it, screwing up audio routing. What fixed it was two consecutive factory resets (one reset didn't do it, no clue why). This was MCU1, but I assume MCU2 software is similar quality, so also possible. Of course it beats me how a charger replacement caused audio issues, but hey. it's Tesla software, perhaps they re-provisioned it manually and it caused said issues (the issue I ran into happened when I replaced my EMMC, so kind of like manual re-provisioning, though I didn't change anything, or root it, not even change the partition sizes to fill the bigger part).