There seems to be at least somewhat of a reasonable difference between saying "X person is at [x,y,z]" and "A vehicle owned by Y Corp is at [x,y,z]." These seem to me to be in completely different categories.
Sure, I get that Musk and his plane are probably inseparable, but it just doesn't seem like that big of a deal to me.
I have absolutely no problem with a website like Twitter banning free speech like "where's musk's plane," since it is his website and he can do what he wants. As long as it isn't the government forcing a private party to say or not say something, then meh I don't really mind. In fact, I think Musk's comment about "as long as it isn't real-time location" is a pretty decent compromise.
I do wish he wouldn't be such a hypocrite about it, and I definitely wish people would stop acting like he is some free-speech absolutist hero, which he is definitely not.