It wouldn't be a reveal without some off-screen handheld footage.
Team Cherry has posted a huge blog post about Hollow Knight, including details on the games third free content pack but also – and more importantly – showing the game running on Switch.
The video shows the game running off-screen in portable mode, it wouldn’t be a Switch reveal without some off-screen handheld footage.
I'm not calling it the other thing.
Different ways for however you're set up.