According to an article by Rolling Stone, the upcoming Switch port of Bethesda and id Software’s Doom will run at 30fps. The full quote states..
“The game and rendering technology underlying Doom is extremely scalable. In bringing Doom to Switch, we targeted outstanding visuals at a solid 30 fps and by maintaining a consistent 30 fps, the experience remains consistently fluid and smooth. We’ve been thrilled with the feedback that Doom is among the very best looking and performing games on Switch.”
In addition, Bethesda also confirmed the campaign and arcade will “fit on a 16GB cartridge.” The multiplayer mode will be a separate download and require 9GB of space.
Doom for Nintendo Switch releases on November 7.