Some of his himes have been leaked and even made the news. But he and other billionaires have many properties all owned by LLCs, and knowing where they lay their heads any given night is difficult.

With people as high-profile as Musk, it's even more difficult because his entourage of staff, security, etc is big enough that they need their own support. You'd think that makes it easier - just follow the line of black vehicles. But lots of the secondary support apparatus may actually be kept at a different site nearby, so the house with all the visible security may be where the support staff and mobile security/logistics team is, while Musk himself may onky have 2-3 vehicles going to his site.

I’m really curious how we don’t know where he lives yet.

A of these guys own a ton of properties and only declare one of them a primary residence due tax purposes.

If Elon lives anywhere, it's on a private jet. I doubt he spends more than ten days a year at any single building.