We can say with absolute certainty now that It will never under any circumstances pass BOTW.
The start and following quarter was far too weak for that to be possible. We've seen that categorically across Nintendo's first party library that games are far more frontloaded , which is the most obvious thing in the world to explain because the audience already all have the console. Even in the most optimistic scenarios, there's only about 30m or so possible sales the hardware could possibly get, and if those were specifically holding out for totk, they'd already have bought it.
And this shouldn't surprise anyone; BOTW reinvented an entire genre and reinvigorated a series, TOTK didn't do any of that, because the groundwork was already there.
It's the same way a ton of people have a lot of good things to say about OOT despite the sequels all mechanically and graphically being improvements, only one of them got there in sales, and the rest far short. And twilight Princess only got there because of the massive success of the Wii, and being the flagship game, an advantage that can't be held over Botw because it was also both of those things.