Nah, it's just a rumor started most likely by Musk himself. Pretty sure it was a ploy to halt the Tesla stock sell offs. It started around the same time another rumor that the Tesla board was going to ask him to step down.
It's the same trick trump was doing his last term, lie to publishers and then accuse them of not being trustworthy for printing unsubstantiated rumors.
Well, I mean he had an entire security detail deputized by the US Marshalls....so it's not like he's just walking out in the open. The guy surrounds himself with sycophants and other billionaires, it's the only way to completely isolate yourself from reality.
I don't think he's really made an actual public appearance since being booed on stage at that chapel show, and that was by people going to see an unfunny transphobe.