This bumps it from 1.0.0 up to Version 1.0.1. According to the official patch notes, it resolves multiple issues to enhance the overall gameplay experience. It we find out what exactly is going on behind the scenes with this update, we'll let you know. For now, here is the official rundown, courtesy of Nintendo's support page:

Anyway, the bottom line is that Nintendo Switch 2 Welcome Tour would have made a great pack-in title, but it still may be worth the $10 for particular demographics. So, just make your decision based on your gaming experience and whether you enjoy quirky mini-games. As for me, I think I’ll be ripping some Mario Kart World instead.

Nintendo has released a new software update for Nintendo Switch 2 Welcome Tour that now sees the game on version 1.0.1.