Nintendo has been very active recently with the Nintendo Switch Online + Expansion Pack retro libraries. While it varies which retro library will be updated with more games, Nintendo's schedule with new additions has reached the point where at least one retro game per month is now guaranteed to be added. In particular, there have been a lot of additions to retro games in the past few weeks.
Well, it's not surprising, but tonight turned out to be no exception. You see, Nintendo has announced that Donkey Kong Land 3 is now available for Nintendo Switch Online members to play. It can be found in the Game Boy retro library. You can see the official Nintendo of Japan YouTube video of the announcement below.