They have for ages already. The Switch update has now been delayed TWICE! But to be fair I feel it's Nintendo's fault.
Nintendo's proper Switch online service STILL hasn't launched, and it's possible Mojang/Microsoft/4J Studios is waiting for just that to make sure that when all of the system's online functionalities are launched, it doesn't cause any trouble with what they would have put in place already. If you're going to launch that, why put in the work twice when you can prepare to have everything working once and for all for when the biggest change yet to the Switch eco system comes into effect in January 2018?