DOOM Eternal’s eBay page leaked the release date for the Nintendo Switch version. The page confirmed that the Nintendo Switch version of DOOM Eternal will launch on June 27th, 2020.
DOOM Eternal has been already available for PlayStation 4, Xbox One and PC since March 20th. The Switch version got delayed because the studio needed more time to finish the development on the game.
Bethesda or id Software didn’t reveal the launch date for the Nintendo Switch version yet. After that leak we might see the official date be pushed back a little.