It is very difficult to maintain wows-numbers.com in that situation.
But maybe we can do something? Maybe if everyone sent a support ticket asking about API, we would show that it is very important for the community?
You often ask me why wows-numbers.com lacks information about new elements added to game in past years.
The sad truth is that Wargaming Public API is kind of dead. It works but is not developed anymore.
Last new feature for WoWS was published in 2017... So there is no information in API about clan battles, new ranked battles, submarines.
Latest status on broken/missing features can be found