It looks like the game will use dynamic rendering.
The Switch version of the Metro Redux collection was announced on January 16, only noting that it weighs 16 gigabytes and fits on one cartridge.
What the gameplay on Switch in 2033 and Last Light looks like, Deep Silver and 4A Games have not yet been shown, however, Wccftech reports that in portable console mode they will work at 30 FPS and a resolution of 720p.
In stationary mode, Switch resolution, according to Wccftech, can reach 1080p. Apparently, the port uses dynamic rendering depending on the load on the system.
The first two Metro worked at 30 FPS and 720p on the PS3 and Xbox 360.
Metro Redux will be released on Switch on February 28.