47 third party, 20 first party. However, some of those are hard to pin down like Dragon Quest 11 and Octopath Traveler. Nintendo published them and is listed as the publisher on the games overview screen on the Switch, so what are they? To me those are Square Enix games. The same applies for Snipperclips, Marvel Ultimate Alliance 3, Astral Chain and Daemon X Machina. And where does Mario x Rabbids belong to?
However, the majority is third party anyway.